Separate mustache file for status states
Refined start date and end date computes to gracefully handle situations that would lead to invalid dates; also made select dropdowns listen to changes on the computes
Merge pull request #1487 from reciprocity/feature/workflow-states

Separate mustache file for status states
Merge pull request #1488 from reciprocity/feature/refine-date-fragment-computes

Better computes on Workflow start_date and end_date
Merge remote-tracking branch 'origin/develop' into feature/email_notification_hooks

Conflicts:
	src/ggrc_workflows/assets/mustache/cycle_task_group_objects/tree.mustache