Hover/focus styles for embedded contacts, default action

js/views/conversation_view.js

@@ -1640,6 +1640,10 @@
     },
 
     async showAllMedia() {
+      if (this.panels && this.panels.length > 0) {
+        return;
+      }
+
       // We fetch more documents than media as they don’t require to be loaded
       // into memory right away. Revisit this once we have infinite scrolling:
       const DEFAULT_MEDIA_FETCH_COUNT = 50;