Window onMove event has been raised incorrectly

[nstoychev]

Steps to reproduce:

1. Click "Change position" button
2. Click on the window title bar

Example: https://stackblitz.com/edit/react-4y29jj-sk9dxc?file=app%2Fmain.jsx

Actual: Clicking on the title bar triggers onMove event and the window change its position.

Expected: Window should not change its position

cc/ @kvelikov