P/62145092 b/12784912 Auditor no longer has ability to choose assignee in PBC request create/edit modal
Cleanup on request modal, refactored if_auditor mustache helper to handle new requests, added auditor guard to request Tier 1
Merge remote-tracking branch 'origin/feature/auditor-assigns-to-audit-lead' into feature/pbc-redesign-improvements

Conflicts:
	src/ggrc/assets/javascripts/mustache_helper.js
	src/ggrc/assets/mustache/requests/tree.mustache
Made the implementation of if_can_edit_request similar to if_auditor
Merge branch 'feature/pbc-redesign-improvements' into HEAD
Merge pull request #1044 from reciprocity/feature/pbc-request-improvements

Feature/pbc request improvements