convert save and modify imageMaps queryboxes to .ui

Change-Id: I222ce47187e46f7de9916bd559846d28c30d4562
Reviewed-on: https://gerrit.libreoffice.org/7201
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>