The problem was always masked out the combination ALT+CTRL, this only
needed when press the ALTGR key, but the other ALT-Key (left side) is
valid.

Change-Id: I8a6f953f519627418fb48ee8d1d68b3cbf797250
Reviewed-on: https://gerrit.libreoffice.org/19923Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>
Reviewed-on: https://gerrit.libreoffice.org/19932
(cherry picked from commit 0ff2015b)