Pressing "ESC" while dragging should move item back to previous position

1. Open a QML file which contains at least two nested items, e.g. a Text item inside a Rectangle item.
2. I used tests\manual\qml\testfiles_quick2\helloworld_inverted.qml from Creator's repository.
3. Start dragging the inner item using the mouse.
4. Press ESC.

The item will be dropped at its current location and the file will be updated.

Instead, pressing ESC should abandon the ongoing change. The item should be moved back to it's previous location. The file should not be changed at all.