Removes an unnecessary message and changes the video bridge message.

app.js

     if($(pres).find(">bridgeIsDown").length > 0 && !bridgeIsDown) {
         bridgeIsDown = true;
         messageHandler.showError("Error",
-            "The video bridge is currently unavailable.");
+            "Jitsi Videobridge is currently unavailable. Please try again later!");
     }
 
 });

desktopsharing.js

 
 function getSwitchStreamFailed(error) {
     console.error("Failed to obtain the stream to switch to", error);
-    messageHandler.showError('Error', 'Failed to get video stream');
     switchInProgress = false;
 }