[WIP] Automatic gettext calls on static texts in HAML

The **haml-magic-translations** gem automatically calls `_()` on all static texts in HAML files.
For string extraction see: https://github.com/potager/haml-magic-translations#extracting-strings-and-merging-translations
Make sure you leave a blank line at the end of the file.  Rubocop should pick it up, but you should also change your editor to enforce that, if possible.