Unify buttons

[plajjan]

Unify all buttons to use our lovely little Jinja2 macro.

Need to be able to set id on buttons so we can hook on javascript events on them..

[garberg]

As it seems like you cannot submit forms by pressing "Enter" when there is no submit button in the form, I suggest we instead apply the button and button__color_ (currently green) to the submit buttons instead.

[plajjan]

+1, it sounds good :>

[plajjan]

Blargh, I don't really know what buttons we have left to unify but I feel it doesn't matter - at least not at this point. They are working and looking pretty fine so not point in "fixing" anything that's not broken and hasn't been for several months. We'll reopen in case something pops up.