AngularJS templates are compiled as assets on deploy. Any translatable
text can't be translated in Ruby during compilation because it's static
text. It needs to be translated with an AngularJS filter in the browser.
The route and controller were in the main app and the views in the engine, with this commit they stay all inside the engine
This is done to keep it simple and remove the unnecessary dependency between main app and engine
If we use this mechanism in the future for other things in the main app or other engines, we can find a way to extract/abstract this
