fdo#82496: Change picture option by rightclicking

Change-Id: I31fb1a1f89030610a9d11b9236e8cde22dbc0ca5
Reviewed-on: https://gerrit.libreoffice.org/11332
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>