Closes https://github.com/electron/electron/issues/43714.
Fixes an issue where the resizing border was not being handled correctly on Linux WCO
caption buttons. This is now taken into account as a part of the NonClientHitTest.
Co-authored-by: trop[bot] <37223003+trop[bot]@users.noreply.github.com>
Co-authored-by: Shelley Vohr <shelley.vohr@gmail.com>