Fixes #134; delineates a per-proposal type CMS Box on the proposal submission form for explicit instructions/descriptive text on the form
Bad rendering on proposal details if no tags

If a proposal has no tags, on the Proposal Details page, the
value of the Category gets displayed shifted up so it looks like
that's the tags value.

Apparently this is a problem with all the "dd" tags on this page,
because I see all the other ones have &nbsp; appended.

So, doing the same for tags.
Merge branch 'feature/134-explicit-cms-box-per-proposal-type' into develop
Merge branch 'develop' into staging