Similar to MSO Drop-down form field and LO Input List.

Change-Id: Idba278d8c2a2106b6f3cc22d8b9f8570f45bfae9
Reviewed-on: https://gerrit.libreoffice.org/67908
Tested-by: Jenkins
Reviewed-by: Tamás Zolnai <tamas.zolnai@collabora.com>