Modal form cleanup

We repeat a lot of templating code in our forms. It makes sense to abstract
some of this repetitive logic and reduce the clutter. This patch give users
the ability to specify modal id, modal header, form id, and a submit url.

Change-Id: Ibcc270b189cf3f53065f163a325ebef07b875beb
Implements: blueprint form-template-to-view
Imported Translations from Transifex

For more information about this automatic import see:
https://wiki.openstack.org/wiki/Translations/Infrastructure

Change-Id: I14bab2c404dbc3f33e8c192d21b0def37485e667
Merge "Imported Translations from Transifex"
Merge "Modal form cleanup"