fdo#73588: fix default alignment in RTL mode.

(cherry picked from commit 036b1fccbfb87a1aab36632843deb29e0a70630f)

Change-Id: Icb932ee51dbf32d8baf4382aa00e89a680f5a41d
Signed-off-by: Kohei Yoshida <kohei.yoshida@collabora.com>