RID_FORMULADLG_FORMULA conversion to .ui

Change-Id: I098c9ee9d22ac0401faf7fc6d65e91bf5b4b2bf8
Reviewed-on: https://gerrit.libreoffice.org/9797
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>