Qt: fix RTL layout
Qt: fix RTL layout

Fix #9170

Qt doesn't set application layout direction by default, so we make it
use locale text direction, e.g. RTL for Arabic.

Signed-off-by: Jean-Baptiste Kempf <7b85a41a628204b76aba4326273a3ccc74bd009a@videolan.org>

xkfz007/vlc,xkfz007/vlc,xkfz007/vlc,xkfz007/vlc,xkfz007/vlc,xkfz007/vlc,xkfz007/vlc