Merge pull request #165 from Unity-Technologies/issue_1.0/editor_window_color_issue

fix editor drag issue

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

                         physicalY: evt.mousePosition.y * this._devicePixelRatio
                     );
                 }
-                else if (evt.type == EventType.MouseUp || evt.rawType == EventType.MouseUp ||
-                        evt.type == EventType.DragExited || evt.type == EventType.MouseLeaveWindow) {
+                else if (evt.type == EventType.MouseUp || evt.rawType == EventType.MouseUp || evt.type == EventType.MouseLeaveWindow) {
                     pointerData = new PointerData(
                         timeStamp: Timer.timespanSinceStartup,
                         change: PointerChange.up,
                         physicalY: evt.mousePosition.y * this._devicePixelRatio
                     );
                 }
-                else if (evt.type == EventType.DragPerform) {
+                else if (evt.type == EventType.DragPerform || evt.type == EventType.DragExited) {
                     pointerData = new PointerData(
                         timeStamp: Timer.timespanSinceStartup,
                         change: PointerChange.dragFromEditorRelease,