Romain Vimont authored Apr 30, 2018 and Hugo Beauzée-Luyssen committed May 03, 2018

On X11 with Qt < 5.10, a resize request invoked XMoveResizeWindow() (see
0285ba4e

), which both moves and resizes.
To avoid moving, it was called with the current geometry() coordinates
as position arguments.

However, the calculated position may be wrong when several displays have
a different devicePixelRatio(). As a consequence, on a secondary
display, every (automatic) resize of the window made it jump to
unexpected locations.

To avoid the problem, just call XResizeWindow(), so that the window is
not moved at all.

Signed-off-by: Hugo Beauzée-Luyssen <hugo@beauzee.fr>