Add Visit UX improvements

[DaveA-W]

Basic Information

Volunteers are only ever going to approximate, and some info is better than none.
So feature suggestions:

• Distance fields non-mandatory, granularity via numeric picker can be 500m. Check null values still catered for by reports okay?
• "Commute Method" non-mandatory, should include "Walk" as an option.
• "Start Time" can be renamed "When", granularity 15 minutes. Default to the start of the current hour.
• "Duration" will usually be 15 or 30 minutes. For less clicks/typing, suggest change to dropdown:
  • 0:15
  • 0:30
  • 0:45
  • 1:00
  • ...
  • 3:00
• "Submit" button is very dev-centric language. Suggest change to "Save".
• After submit, the visit list should auto-expand the visit that has just been added. This helps the user confirm they've entered details correctly, and prompts them that they can report an associated incident or pet concern.