Add placeholders to translation forms

[simonprev]

Interpolations are strings automatically marked (based on the format) to
be replaced by the application at runtime. Those strings are meant to be
left unmodified and not translatable. The UI reflects that. The
interpolations shown to the user is always the master translation’s
ones. This is to clearly show on not translated content that maybe
interpolations uploaded after the correction were removed or added.

Closes partially #24. This does not allow user-defined regex or special input handling of the placeholders, but it could be done in the future.

In action

With a translated interpolation

[louim]

Maybe not the best place to ask, but I just updated our Accent version. What would be the best way to generate placeholders for existing strings? Is there some kind of command I can run?

[simonprev]

I came up with this simple script: https://gist.github.com/simonprev/6d65fc01d6b9dd9ae64cae9dc9fe8741

There is one thing it does not generate: previous_translation to handle operation rollback. But the script updates operations and translations correctly. It’s a little bit hackish and the best way would be to reupload your file but I tried it locally and it works

Be sure to replace the @regex and @document_id to fit your data 😄

[louim]

@simonprev thanks, worked perfectly