Users were unable to reset a translation to its original value after
updating it because we weren't storing anything in the database in that
case.
I've considered deleting the existing translation when this happens. I'm
not sure about which approach is the better one, so I'm using the less
destructive one.
This way we avoid fetching each translation every time it's requested.
This reduces the amount of queries in the development logs and also
makes the test suite faster.
We were inconsistent on this one. I consider it particularly useful when
a method starts with a `return` statement.
In other cases, we probably shouldn't have a guard rule in the middle of
a method in any case, but that's a different refactoring.
This code might be slightly slower because it performs one query per
field in the form, but I didn't notice any differences on my development
machine, and the code is now much easier to understand.
After creating a translation in spanish, it was also displaying it when selecting
the english locale.
This was due to the code picking the first translation available
With this commit, we are checking for an existing translation in the current locale
and displaying it if it exists
When visiting, for example, /admin/site_customization/information_texts?locale=fr
we were getting an `UncaughtThrowError: uncaught throw :exception`
With the following payload
```
File "/aytomad/app/participa/participacion/releases/20180726231929/app/views/admin/site_customization/information_texts/_form_field.html.erb" line 5
File "/aytomad/app/participa/participacion/releases/20180726231929/app/helpers/globalize_helper.rb" line 35 in block in globalize
```
Substituting this line seems to solve it
Note that we had to remove the portuguese local too, as it was giving a different
exception due to this change. This problem, has been solved in the original
globalization PR
