Merge branch 'dev_1.17.5' of github.com:Unity-Technologies/com.unity.uiwidgets into dev_1.17.5

com.unity.uiwidgets/Runtime/gestures/multidrag.cs

 
             D.assert(_pointers.ContainsKey(pointer));
             GestureBinding.instance.pointerRouter.removeRoute(pointer, _handleEvent);
-            _pointers[pointer].dispose();
+            var pointerData = _pointers[pointer];
+            pointerData.dispose();
         }