[hotfix] Assets splash was not closed on firefox due to thread priority change

Change-Id: Ib42342aaf015142d1cf5bd7a93e547fcb903da47

gz3d/src/gziface.js

@@ -213,6 +213,9 @@ GZ3D.GZIface.prototype.onConnected = function()
     }
 
     this.assetProgressData.prepared = true;
+    if (this.assetProgressCallback) {
+      this.assetProgressCallback(this.assetProgressData);
+    }
     this.gui.setSceneStats(message);
     this.sceneTopic.unsubscribe();
   };