Hides video wrapper when avtar is shown, and make it visible when we hide the avtar.

modules/UI/videolayout/LargeVideo.js

     }
 
     showAvatar (show) {
+        // if we are showing the avatar, this means there is no video on large
+        // so let's hide its video wrapper
+        show ? this.hide() : this.show();
         this.$avatar.css("visibility", show ? "visible" : "hidden");
     }