...introduced with c1b9d61b "tdf#88276: Add slot
and handlers for toolbar|sidebar buttons"

Change-Id: Ic63a7766b7f0ccae9144a0ef276e2df63fc22f2e
(cherry picked from commit 4275056a)
Reviewed-on: https://gerrit.libreoffice.org/17508Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>