We were manually generating the IDs in order to pass them as data
attributes in the HTML in a component where we don't have access to the
form which has the inputs.
However, these data attributes only make sense when there's a form
present, so we can pass the form as a parameter and use it to get the
IDs.
We can now define a map as editable when there's an associated form,
which makes sense IMHO.
We're calling this method after setting the map location with
`map_location = MapLocation.new if map_location.nil?`, so the condition
`map_location.present?` is always going to be true.
We were very inconsistent regarding these rules.
Personally I prefer no empty lines around blocks, clases, etc... as
recommended by the Ruby style guide [1], and they're the default values
in rubocop, so those are the settings I'm applying.
The exception is the `private` access modifier, since we were leaving
empty lines around it most of the time. That's the default rubocop rule
as well. Personally I don't have a strong preference about this one.
[1] https://rubystyle.guide/#empty-lines-around-bodies
It was only used in one place, and could easily be replaced.
Note we usually use HTML classes like `map-location` instead of
`map_location`, but I've kept the underscore for compatibility with the
previous version.
