no default LTR mode does not mean RTL, fdo#68097

Change-Id: Ice4957077e7eda5f7bb93042d6e2ba745935ef8b
(cherry picked from commit 045e037b7acde9d8e63fbb977c28b167e8815278)
Reviewed-on: https://gerrit.libreoffice.org/6527
Tested-by: Eike Rathke <erack@redhat.com>
Reviewed-by: Eike Rathke <erack@redhat.com>