Fix X11Window no longer updating
Commit 1: scene/surfaceitem_x11: improve size mismatch warning
Commit 2: round move resize geometry in X11Window, to prevent windows from no longer updating because window and buffer size don't match
Commit 1: scene/surfaceitem_x11: improve size mismatch warning
Commit 2: round move resize geometry in X11Window, to prevent windows from no longer updating because window and buffer size don't match