Making sure units have unit numbers

This is just a minor improvement, but now when providers list units, apartments or flats, the listing form will now check to make sure they entered the unit/flat/apartment number.



This will handle a variety of unit address formats, things like:

Flat 2 14 Smith St
2/14 Smith St
F 2 14 Smith St
Unit 2 14 Smith St
2/14 Smith St
U 2 14 Smith St
APT 2 14 Smith St

Only listings with "unit", "flat", or "apartment" in the property type will be checked in this way. One exception is granny flats, which won't require a unit number.

Hopefully this improves the quality of addresses, without making you do any extra administrative work.