send null path if no img
skip background css if no img path
dont emit background-url if no img for template
support editing field config
add validation feedback
Merge pull request #609 from concerto/field_config_ui

support editing field configs
I guess we need to clobber the hash.  Also, we should use a key that we support
Added clarifying text to datetimes in content#new
Improved ticker preview by changing to keyup event
use a first or create
users are confirming their Concerto accounts
fix autoclose on datepicker and show on icon click
include field_configs as config array in setup.json for frontend
Merge pull request #612 from concerto/include_field_config_in_setup_json

include field_configs as config array in setup.json for frontend
fixes #616 restrict user deletion if screen owner
Merge branch 'master' of github.com:concerto/concerto
fix broken tests due to dependents
cleaner configs in json
remove group#edit to close #603
make the check cleaner, make sure the variable is defined