Draft: Render task Due Dates independent of the Deadline task subtype
Change rendering Due Dates from a subtype label to task title prefix style similar to Spaces.
Test Plan:
- Go to e.g. http://phorge.localhost/applications/view/PhabricatorCalendarApplication/ and http://phorge.localhost/phame/
- On http://phorge.localhost/maniphest/query/J9I8.S6uVfWw/#R , click "Use Results" and select "Export Data" and select CSV
Bug: T335395