Show new-version indicator on button as well

app/resources/sass/app.scss

@@ -157,6 +157,11 @@ h2 {
     z-index: 5;
 }
 
+.is-indicator-button {
+    display: inline-block;
+    left: -18px;
+}
+
 .is-background-success-light {
     background-color: rgb(215, 253, 200);
 }

app/views/admin.php

@@ -1028,6 +1028,9 @@
         <?php if (env('APP_SERVICE_URL')) { ?>
             <div class="version-check">
                 <a class="button is-link" href="{{ url('/admin?cv=1&tab=info') }}">{{ __('app.check_for_new_version') }}</a>
+                @if (VersionModule::getCachedVersion() > config('version'))
+                    <i class="is-indicator-tab is-indicator-button"></i>
+                @endif
             </div>
         <?php } ?>
     <?php } ?>