Add region to project application form. Change homepage search to work with regions

On top of the standard city/province fields we have, we need to give a field host the ability to define what region his project takes place in. This region dropdown would be from a pre-defined YAML list of regions available.

This field needs to push to SF as well. You need to specify the same values in the yaml as in the picklist in SF.

On the home page, where the main project search lies, change the city/postal code field to use our region dropdown.