since

commit c3a98155
Author: Caolán McNamara <caolanm@redhat.com>
Date:   Tue Oct 11 16:33:17 2016 +0100

    de-src writer formula toolbar

Change-Id: I7ab31f19d36102978ac2535da03ed15c14ce5f47
Reviewed-on: https://gerrit.libreoffice.org/38573Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>