Differentiate between in-platform and CSV upload geolocation errors

[noah-schechter]

Current Right now, we have one error message when Atlos can't parse a geolocation: "Unable to parse this location; please enter a latitude-longitude pair separated by commas."

The problem is that this is an actively unhelpful message if you're uploading a CSV—Atlos needs latitude and longitude columns, not a comma-separated pair for CSV upload.

Proposed

• If you're in the geolocation editing modal for an incident, the current error message is great.
• If you're in CSV upload, we instead need to say "Unable to parse this location; please enter geolocation in separate "latitude" and "longitude" columns."