Add remove v-cloak and make sure it's `true`.

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

@@ -64,7 +64,7 @@ export default RepoSidebar;
 </script>
 
 <template>
-<div id="sidebar" :class="{'sidebar-mini' : isMini}" v-cloak>
+<div id="sidebar" :class="{'sidebar-mini' : isMini}" v-cloak="true">
   <table class="table">
     <thead v-if="!isMini">
       <tr>

app/assets/stylesheets/framework/layout.scss

@@ -117,10 +117,6 @@ body {
   margin-top: $header-height + $performance-bar-height;
 }
 
-[v-cloak] {
-  display: none;
-}
-
 .vertical-center {
   min-height: 100vh;
   display: flex;