Prevent gesture recognizers from eating our touch events. Fixes #375

Limelight/Input/StreamView.m

@@ -199,6 +199,13 @@
 - (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event {
 }
 
+- (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer {
+    // Disable all gesture recognizers to prevent them from eating our touches.
+    // This can happen on iOS 13 where the 3 finger tap gesture is taken over for
+    // displaying custom edit controls.
+    return NO;
+}
+
 - (BOOL)textFieldShouldReturn:(UITextField *)textField {
     // This method is called when the "Return" key is pressed.
     LiSendKeyboardEvent(0x0d, KEY_ACTION_DOWN, 0);