- remove frame when stopping desktop sharing

deskshare/applet/src/main/java/org/bigbluebutton/deskshare/client/ScreenRegionSharer.java

@@ -30,6 +30,7 @@ public class ScreenRegionSharer implements ScreenSharer {
 	}
 	
 	public void stop() {
+		frame.setVisible(false);	
 		sharer.stopSharing();
 		System.out.println(NAME + "Closing Screen Capture Frame");
 	}