Fix mouse cursor jumping on right click gesture where only the 2nd finger is lifted to complete the gesture

Limelight/Input/StreamView.m

@@ -139,6 +139,20 @@
             isDragging = false;
             LiSendMouseButtonEvent(BUTTON_ACTION_RELEASE, BUTTON_LEFT);
         }
+        
+        // We we're moving from 2+ touches to 1. Synchronize the current position
+        // of the active finger so we don't jump unexpectedly on the next touchesMoved
+        // callback when finger 1 switches on us.
+        if ([[event allTouches] count] - [touches count] == 1) {
+            NSMutableSet *activeSet = [[NSMutableSet alloc] initWithCapacity:[[event allTouches] count]];
+            [activeSet unionSet:[event allTouches]];
+            [activeSet minusSet:touches];
+            touchLocation = [[activeSet anyObject] locationInView:self];
+            
+            // Mark this touch as moved so we don't send a left mouse click if the user
+            // right clicks without moving their other finger.
+            touchMoved = true;
+        }
     }
 }