Help removing hover-over button resizing

Hi all,
This is for a Discourse page in-development—the same forum platform software that I see is being used right here. I am modifying someone else’s code, such that his “New Topic” button, which normally appears collapsed in the form of a circle with a plus-sign, in the lower-right side of the forum’s homepage, is instead static in its expanded state—that being a rounded rectangle. In other words, I want it appear as you see it in this screenshot:

Here’s the original code (note: expand the triangle you see at “Full CSS code” in this wizbang’s post). What I did, was delete everything in the //New Topic Fab section from “overflow: hidden;” onward.

//add space between categories
.topic-list.categories {
  border-spacing: 0 1em;
  border-collapse: separate;
}

//change category background color to white
.topic-list.categories>tbody>tr {
  background-color: lighten($secondary, 20%);
}

//padding for category title and description
.topic-list.categories th,
.topic-list.categories td {
  padding: 0 15px 0 15px;
}

//Shadows for categories
.topic-list.categories>tbody>tr td.category,
.topic-list.categories>tbody>tr td.stats,
.topic-list.categories>tbody>tr td.latest {
  -webkit-box-shadow: 0 2px 5px 0 rgba(0, 0, 0, 0.16), 0 0 0 0 rgba(0, 0, 0, 0.12);
  -moz-box-shadow: 0 2px 5px 0 rgba(0, 0, 0, 0.16), 0 0 0 0 rgba(0, 0, 0, 0.12);
  box-shadow: 0 2px 5px 0 rgba(0, 0, 0, 0.16), 0 0 0 0 rgba(0, 0, 0, 0.12);
}

//add shadow behind the list of topics on right in Category and Latest View
//add shadow behind list of categories on left in Category and Latest View
//add shadow behind topics in Latest view
.category-list,
.topic-list:not(.categories),
.latest-topic-list {
  -webkit-box-shadow: 0 2px 5px 0 rgba(0, 0, 0, 0.16), 0 2px 10px 0 rgba(0, 0, 0, 0.12);
  -moz-box-shadow: 0 2px 5px 0 rgba(0, 0, 0, 0.16), 0 2px 10px 0 rgba(0, 0, 0, 0.12);
  box-shadow: 0 2px 5px 0 rgba(0, 0, 0, 0.16), 0 2px 10px 0 rgba(0, 0, 0, 0.12);
  background-color: lighten($secondary, 10%);
  border-collapse: collapse;
}

//underline navigation links
.nav-pills>li.active>a,
.nav-pills>li>a.active {
  color: $primary;
  font-weight: 500;
  background-color: $secondary;
  border-bottom: 3px solid $tertiary;
}

//remove highlighting navigation background on hover
.nav-pills>li>a:hover {
  background-color: $secondary;
}

//fix color of user profile navigation icons
.user-main .nav-pills {
  a.active i {
    color: $primary;
  }
  a:hover:not(.active) i {
    color: $quaternary;
  }
}

//create conversation cards
.topic-body {
  -webkit-box-shadow: 0 2px 5px 0 rgba(0, 0, 0, 0.16), 0 2px 10px 0 rgba(0, 0, 0, 0.12);
  -moz-box-shadow: 0 2px 5px 0 rgba(0, 0, 0, 0.16), 0 2px 10px 0 rgba(0, 0, 0, 0.12);
  box-shadow: 0 2px 5px 0 rgba(0, 0, 0, 0.16), 0 2px 10px 0 rgba(0, 0, 0, 0.12);
  background-color: lighten($secondary, 10%);
  margin-top: 10px;
  padding-left: 20px;
  border-radius: 2px;
  padding-right: 20px;
}

//more space for avatars
.topic-avatar {
  border-top: 0;
  padding-right: 10px;
  .avatar-flair {
    right: 4px;
  }
}

//remove stray border from bottom of last post
.topic-status-info {
  border-top: 0;
}

//improve format of embedded posts
.embedded-posts .topic-avatar {
  padding-left: 0px;
}

.embedded-posts.top.topic-body {
  -webkit-box-shadow: 0 2px 5px 0 rgba(0, 0, 0, 0), 0 2px 10px 0 rgba(0, 0, 0, 0);
  -moz-box-shadow: 0 2px 5px 0 rgba(0, 0, 0, 0), 0 2px 10px 0 rgba(0, 0, 0, 0);
  box-shadow: 0 2px 5px 0 rgba(0, 0, 0, 0), 0 2px 10px 0 rgba(0, 0, 0, 0);
  background-color: $secondary;
}

//raise and round buttons
.btn:not(.bulk-select) {
  border-radius: 2px;
  -webkit-box-shadow: 0 2px 5px 0 rgba(0, 0, 0, 0.16), 0 2px 10px 0 rgba(0, 0, 0, 0.12);
  -moz-box-shadow: 0 2px 5px 0 rgba(0, 0, 0, 0.16), 0 2px 10px 0 rgba(0, 0, 0, 0.12);
  box-shadow: 0 2px 5px 0 rgba(0, 0, 0, 0.16), 0 2px 10px 0 rgba(0, 0, 0, 0.12);
}

//flatten editor, topic-map, more badges, and revision view buttons
.d-editor-button-bar .btn,
.topic-map .btn.no-text,
.badge-section .btn,
#revision .btn {
  border-radius: 0px;
  -webkit-box-shadow: 0 2px 5px 0 rgba(0, 0, 0, 0), 0 2px 10px 0 rgba(0, 0, 0, 0);
  -moz-box-shadow: 0 2px 5px 0 rgba(0, 0, 0, 0), 0 2px 10px 0 rgba(0, 0, 0, 0);
  box-shadow: 0 2px 5px 0 rgba(0, 0, 0, 0), 0 2px 10px 0 rgba(0, 0, 0, 0);
}

//properly space buttons on login modal
button#login-link,
button#new-account-link {
  padding-left: 20px;
}

//darken color, remove shadow and border when pressed
.btn:active {
  background-color: rgba(0, 0, 0, .4);
  -webkit-box-shadow: 0 0px 0px 0 rgba(0, 0, 0, 0.16), 0 0px 00px 0 rgba(0, 0, 0, 0.12);
  -moz-box-shadow: 0 0px 0px 0 rgba(0, 0, 0, 0.16), 0 0px 00px 0 rgba(0, 0, 0, 0.12);
  box-shadow: 0 0px 0px 0 rgba(0, 0, 0, 0.16), 0 0px 00px 0 rgba(0, 0, 0, 0.12);
}

.btn:focus {
  outline: -webkit-focus-ring-color auto 0px;
}

//shift "more" button slightly left
.more-topics .btn {
  margin-right: 10px;
}

//New Topic Fab
#create-topic.btn-default {
  border-radius: 40px;
  position: fixed;
  bottom: 30px;
  right: 50px;
  z-index: 999;
  padding: 24px 20px 22px 5px;
  background-color: #4B6531;
  color: #4B6531;
  white-space: nowrap;
  text-indent: 10px;
  -webkit-box-shadow: 0 0 4px rgba(0, 0, 0, 0.14), 0 4px 8px rgba(0, 0, 0, 0.28);
  -moz-box-shadow: 0 0 4px rgba(0, 0, 0, 0.14), 0 4px 8px rgba(0, 0, 0, 0.28);
  box-shadow: 0 0 4px rgba(0, 0, 0, 0.14), 0 4px 8px rgba(0, 0, 0, 0.28);
}

#create-topic.btn-default .fa-plus {
  color: white;
}

#create-topic.btn-default:hover {
  text-indent: 8px;
  width: 190px;
  color: white;
}

//Reply Fab
.timeline-footer-controls {
  position: relative;
}

.widget-button.btn.create {
  border-radius: 40px;
  position: absolute;
  top: 50px;
  left: -18px;
  z-index: 999;
  padding: 24px 20px 22px 5px;
  background-color: $tertiary;
  color: white;
  text-indent: 10px;
  -webkit-box-shadow: 0 0 4px rgba(0, 0, 0, 0.14), 0 4px 8px rgba(0, 0, 0, 0.28);
  -moz-box-shadow: 0 0 4px rgba(0, 0, 0, 0.14), 0 4px 8px rgba(0, 0, 0, 0.28);
  box-shadow: 0 0 4px rgba(0, 0, 0, 0.14), 0 4px 8px rgba(0, 0, 0, 0.28);
  overflow: hidden;
  width: 63px;
  height: 63px;
  -webkit-transition: right .5s, bottom .5s, border-radius .5s, text-indent .2s, visibility 1s, width .2s ease, height .5s ease .4s, color .5s, background-color 2s, -webkit-transform .5s;
  transition: right .5s, bottom .5s, border-radius .5s, text-indent .2s, visibility 1s, width .2s ease, height .5s ease .4s, color .5s, background-color 2s, transform .5s;
}

//Center and increase size of reply icon
.widget-button.btn.create .fa-reply {
  color: white;
  font-size: 20px;
  margin-left: -8px;
}

//Proper spacing for iPad portrait
@media only screen and (min-width: 768px) and (max-width: 1250px) {
  .timeline-container {
    margin-left: 820px;
  }
  .topic-admin-popup-menu {
    left: -40% !important;
  }
}

//Properly space notifications button
.widget-button.btn.notifications-dropdown {
  right: 4px;
  position: relative;
  border-radius: 40px;
  width: 30px;
  padding: 6px;
}

//cards for search results
.fps-result {
  -webkit-box-shadow: 0 2px 5px 0 rgba(0, 0, 0, 0.16), 0 2px 10px 0 rgba(0, 0, 0, 0.12);
  -moz-box-shadow: 0 2px 5px 0 rgba(0, 0, 0, 0.16), 0 2px 10px 0 rgba(0, 0, 0, 0.12);
  box-shadow: 0 2px 5px 0 rgba(0, 0, 0, 0.16), 0 2px 10px 0 rgba(0, 0, 0, 0.12);
  background-color: lighten($secondary, 10%);
  margin-top: 10px;
  padding: 20px;
  border-radius: 2px;
}

@keyframes background-fade-highlight {
  0% {
    background-color: lighten($tertiary, 20%);
  }
  100% {
    background-color: lighten($secondary, 10%);
  }
}

#topic-status-info {
  border-top: none;
}

// RTL Overrides
.rtl {
  .widget-button.btn.notifications-dropdown .fa {
    margin-left: -2px;
  }
  .topic-avatar {
    padding-right: initial;
    padding-left: 10px;
    .avatar-flair {
      right: initial;
      left: 4px;
    }
  }
  .embedded-posts .topic-avatar {
    padding-left: initial;
    padding-right: 0;
  }
  button#login-link,
  button#new-account-link {
    padding-left: 20px;
    padding-right: 20px;
  }
  #create-topic.btn-default {
    right: initial;
    left: 50px;
    padding: 24px 5px 22px 20px;
  }
  .widget-button.btn.create {
    left: initial;
    right: -18px;
    padding: 24px 5px 22px 20px;
  }
  .widget-button.btn.create .fa-reply {
    margin-left: initial;
    margin-right: -8px;
  }
  .widget-button.btn.notifications-dropdown {
    right: initial;
    left: 4px;
  }
  .widget-button.btn.notifications-dropdown .fa {
    margin-left: initial;
    margin-right: -2px;
  }
}

// RTL Overrides
@media only screen and (min-width: 768px) and (max-width: 1250px) {
  .rtl {
    .timeline-container {
      margin-left: initial;
      margin-right: 820px;
    }
    .topic-admin-popup-menu {
      left: initial !important;
      right: -40% !important;
    }
  }
}


//Mods from Sam's theme

.topic-list > tbody > tr:nth-child(odd) {
    background-color: white;
}


.topic-list > tbody tr:not(.last-visit):not(.topic-list-item-separator) td {
    border-bottom: 1px solid #eee;
}

.topic-list a.title:not(.badge-notification) {
    color: #3b5998;
    font-weight: normal;
    font-family: 'Helvetica Neue', Helvetica, Arial, Utkal, sans-serif;
    font-size: 18px;
}

.topic-list a.title:not(.badge-notification):hover {
    text-decoration: underline;
}

.topic-list .creator, .topic-list .editor {
    font-size: 13px;
    display: block;
    margin-top: 3px;
}

.topic-list .main-link {
    width: auto;
}


.topic-list {
    td, .creator a, .editor a {
        color: #888;
    }
}

.topic-list td {
    padding-bottom: 10px;
}

.topic-list th {
    color: black;
    background-color: #fafafa;
}


.topic-list {
    border-top: none;
}

.topic-list td:first-of-type {
    padding-bottom: 10px;
    padding-left: 10px;
    padding-top: 10px;
}

.topic-list tr.topic-list-item-separator td:first-of-type {
    padding: 0;
}

 
.topic-list {
    .fa-tag {
        opacity: 0.7;
        font-size: 10px;
        margin-right: -2px;
    }
    .num.posts-map {
        position: relative;
        font-size: 17px;
        a {
            color: #888 !important;
            font-weight: normal;
        }
        a.heatmap-high {
            color: #c66 !important;   
        }
        width: 100px;
    }
}

.topic-list td.last-post, .topic-list th.activity {
    width: 160px;
    .relative-date {
        color: #666;
    }
}


// Author Avatar script
.topic-list td.first-post {
    width: 65px;
    text-align:center;
    padding-bottom:14px;
    padding-top:14px;
    .relative-date {
        color: #666;
    }
}
.topic-list th.authorcenter {
    text-align:center;
}




.topic-list .creator .relative-date {
    margin-left: 8px;
}

.badge-category-bg {
    opacity: 0.8;
}

.topic-list .badge-wrapper.bar {
    .badge-category {
      color: #9a9a9a !important;
      font-weight: 600;
      font-size: 12px;
      padding: 2px 6px;
    }
    .badge-category-bg {
        top: -1px;
    }
}

.last-post {
    .poster-avatar {
        margin-right: 10px;
    }
    .poster-avatar, .poster-info {
        float: left;
    }
}

.topic-list .posts {
    width: auto;
}

/* topic page */
#topic-progress {
    background-color: #f1f1f1;
    color: #666;
    font-weight: normal;
    .bg {
       background-color: #bee9e9;
    }
}

nav.post-controls button.has-like {
    color: #08c;
}

.badge-wrapper.bullet span.badge-category {
    color: #333 !important;
}

.creator .badge-wrapper.bullet span.badge-category {
    color: #888 !important;
    margin-top: -2px;
}


#suggested-topics td.main-link {
    width: 500px;
}

.topic-list a.title.visited:not(.badge-notification) {
    color: #6644aa;
}


.topic-list-item .discourse-tags {
    font-size: 0.75em;
    display: inline-block;
    margin-left: 5px;
}

By making that delete, what I end up with, when NOT hovering over the button, is this. …which humorously is, ehem, not the circle I started with, but also not the fixed wide button with white text I’m trying to attain. Your help greatly appreciated. Thanks so much!

Ryan