When adding a verse, the suggested verse number is always 1
Original Launchpad bug 1790938: https://bugs.launchpad.net/openlp/+bug/1790938
Reported by: ubuntu-jaggard (Matthew Jaggard).
Despite there existing a method called update_suggested_verse_number in the verse editor, it appears that the suggested verse number is always 1 which makes entering new songs quite annoying because you have to select the number every time, whereas it should suggest the next available number for the verse type.