Add show_controls to editor support.

src/scss/favorite.scss

@@ -1,12 +1,14 @@
 ha-icon.favorite {
   position: absolute;
-  color: var(--primary-color);
-  padding: 2px;
+  color: gold;
+  background: rgba(0,0,0,0.2);
+  border-radius: 50%;
 }
 
 ha-icon.timeline {
   position: absolute;
   color: var(--primary-color);
-  padding: 2px;
   right: 0px;
+  background: rgba(0,0,0,0.2);
+  border-radius: 50%;
 }