#130 - Fix 'trigger with options' material search.

* Was failing because of CSRF protection. This shouldn't even be using
  POST. Should use GET. But, that involves too much change right now.
  Since the dashboard might be rewritten soon, leaving it as POST and
  disabling CSRF protection for only that method (which is not making
  any POST-like changes anyway).
Merge pull request #368 from arvindsv/fix_trigger_with_options_material_popup

#130 - Fix 'trigger with options' material search.