Updating forms to include both dynamic vars and classes from form builder. Also updating drop down to include css vars from form builder.
Merge pull request #1170 from modmedia/develop

Updating forms to include both dynamic vars and classes from form builde...
Adding tweak for #1169
Adding new muraMobileTemplate request attribute to indicate whether special rendering behaviors should happen instead on simply whether if it's a mobile request.
Merge branch 'develop' of github.com:blueriver/MuraCMS into develop