1. Changing status name from open to screen.
2. Removing the ability to set priority in the task editor to simplify the process.
Modifying the arc config for our own use.
Typo in the URL.
Modifying phab based on some process updates.

Summary: Changing the status name of open to screen to denote that this task needs to be screened.

Test Plan: Review

Reviewers: artem

CC: alexmedina

Differential Revision: http://phabricator.path.com/D2892