Summary:
Ref T8434. Minor cleanup/modernization. I made type selection modal (like Herald, Auth, etc) so we can render the form on the next screen based on the type.
{F472519}
Test Plan: Created a new source, edited an existing source.
Reviewers: btrahan
Reviewed By: btrahan
Subscribers: epriestley
Maniphest Tasks: T8434
Differential Revision: https://secure.phabricator.com/D13161
Summary: ...and get the basic edit flow "working" for a new NuanceSourceDefinition - the Phabricator Form. ...and fix a dumb bug in the query class so when you redirect to the view page / try to edit an existing NuanceSource you don't fatal.
Test Plan: played around with the edit form and it worked!
Reviewers: epriestley
Reviewed By: epriestley
CC: Korvin, epriestley, aran
Differential Revision: https://secure.phabricator.com/D7585
