Change icons to be more generic.

app/assets/javascripts/repo/components/repo_tab.vue

@@ -12,8 +12,8 @@ const RepoTab = {
   computed: {
     changedClass() {
       const tabChangedObj = {
-        'fa-times': !this.tab.changed,
-        'fa-circle': this.tab.changed,
+        'fa-times close-icon': !this.tab.changed,
+        'fa-circle unsaved-icon': this.tab.changed,
       };
       return tabChangedObj;
     },

app/assets/stylesheets/pages/repo.scss

@@ -148,8 +148,8 @@
           }
         }
 
-        i.fa.fa-times,
-        i.fa.fa-circle {
+        .close-icon,
+        .unsaved-icon {
           float: right;
           margin-top: 3px;
           margin-left: 15px;