We were using `map_location` in one place and
`location-map-remove-marker` in another one. We usually use dashes in
HTML class names, we don't say "location map" anywhere else.
We had two different keys with the same text and were passing it as a
parameter. Since the text is the same in any case, we don't need a
parameter for it.
Note we are using the `proposals` i18n key instead of creating a new one
in a `shared` namespace one because creating a new key would mean that
we'd lose the already existing translations in Crowdin.
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 were probably setting them separately to avoid having blank data
attributes in the HTML. However, when a data attribute is `nil`, Rails
doesn't write it in the HTML in the first place.
