Merge branch '28034-icon-in-issue-search-dropdown-still-animates' into 'master'

Resolve "Icon in issue search dropdown still animates"

Closes #28034

See merge request !9156

app/assets/stylesheets/framework/animations.scss

@@ -128,8 +128,7 @@
 
 .note-action-button .link-highlight,
 .toolbar-btn,
-.dropdown-toggle-caret,
-.fa:not(.fa-bell) {
+.dropdown-toggle-caret {
   @include transition(color);
 }
 

app/assets/stylesheets/framework/avatar.scss

@@ -28,6 +28,8 @@
 
 .avatar {
   @extend .avatar-circle;
+  @include transition-property(none);
+
   width: 40px;
   height: 40px;
   padding: 0;