fix mouse tracking issue

com.unity.uiwidgets/Runtime/editor/editor_mouse_tracking.cs

             var lastMouseEvent = new List<PointerEvent>();
             foreach (int deviceId in this._lastMouseEvent.Keys) {
                 var _deviceId = deviceId;
+                var deviceEvent = this._lastMouseEvent[_deviceId];
+                
+                //only process PointerEditorDragEvents
+                if (!(deviceEvent is PointerDragFromEditorEnterEvent ||
+                      deviceEvent is PointerDragFromEditorHoverEvent ||
+                      deviceEvent is PointerDragFromEditorExitEvent)) {
+                    continue;
+                }
+
                 lastMouseEvent.Add(this._lastMouseEvent[_deviceId]);
                 SchedulerBinding.instance.addPostFrameCallback(_ => {
                     foreach (var lastEvent in lastMouseEvent) {

com.unity.uiwidgets/Runtime/editor/editor_window.cs

                     );
                 }
                 else if (evt.type == EventType.MouseUp || evt.rawType == EventType.MouseUp ||
-                        evt.type == EventType.DragExited) {
+                        evt.type == EventType.DragExited || evt.type == EventType.MouseLeaveWindow) {
                     pointerData = new PointerData(
                         timeStamp: Timer.timespanSinceStartup,
                         change: PointerChange.up,

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

 
             foreach (int deviceId in this._lastMouseEvent.Keys) {
                 PointerEvent lastEvent = this._lastMouseEvent[deviceId];
+                
+                //only process PointerEvents
+                if (!(lastEvent is PointerMoveEvent ||
+                      lastEvent is PointerHoverEvent ||
+                      lastEvent is PointerDownEvent)) {
+                    continue;
+                }
                 MouseTrackerAnnotation hit = this.annotationFinder(lastEvent.position);
 
                 if (hit == null) {