Fixed issue 311: Angle of rotation value isn't updated when the rotation is made with the handle. Also made opacity options hide while dragging slider

git-svn-id: http://svg-edit.googlecode.com/svn/trunk@878 eee81c28-f429-11dd-99c0-75d572ba1ddd

editor/svgcanvas.js

@@ -4610,8 +4610,10 @@ function BatchCommand(text) {
 		} // for each elem
 		svgroot.unsuspendRedraw(handle);	
 
-		// Calling changed here will cause the toolbar to be updated too many times
-// 		call("changed", elems);
+		// Only call "changed" if really necessary, as it updates the toolbar each time
+		if(current_mode == 'rotate') {
+			call("changed", elems);
+		}
 	};
 	
 	// This function returns a BatchCommand object which summarizes the