When we grouped the fields together, the last one turned into a
`last-child`, which foundation automatically aligns to the right.
The markdown editor also needed to be tweaked a little bit.
This way we can show/hide that div when displaying translations, and we
can remove the duplication applying the same logic to the label, the
input, the error and the CKEditor.
This way we also solve the problem of the textarea of the CKEditor
taking space when we switch locales, as well as CKEditor itself taking
space even when not displayed.
Updating it required reorganizing the form so translatable fields are
together.
We also needed to add a `hint` option to the form label and input
methods so the hint wouldn't show up for every language.
Finally, the markdown editor needed to use the same globalize attributes
as inputs, labels and hints, which adds a bit of duplication.
