devilry_qualfiesforexam: Preview UI skeleton.
devilry_qualfiesforexam: Remove period id from app url.
devilry_qualfiesforexam: Handle periodid in the app.
devilry_qualfiesforexam: Cleanup the apptemplate.
devilry_qualfiesforexam: Handle routing from plugins into preview.
devilry_qualfiesforexam: Get params into preview controller.