Allow the Herald Rule Editor to apply generic "Edge" transactions
Allow the Herald Rule Editor to apply generic "Edge" transactions

Summary: Fixes T13469. Currently, "Mute" applies a generic edge transaction but the editor doesn't whitelist them.

Test Plan: Muted a Herald rule.

Maniphest Tasks: T13469

Differential Revision: https://secure.phabricator.com/D20943

Khan/phabricator,phacility/phabricator,freebsd/phabricator,Automatic/phabricator,wikimedia/phabricator,wikimedia/phabricator,freebsd/phabricator,freebsd/phabricator,MicroWorldwide/phabricator,Khan/phabricator,Automatic/phabricator,MicroWorldwide/phabricator,Automatic/phabricator,Automatic/phabricator,phacility/phabricator,MicroWorldwide/phabricator,MicroWorldwide/phabricator,freebsd/phabricator,Khan/phabricator,phacility/phabricator,Khan/phabricator,wikimedia/phabricator,wikimedia/phabricator,phacility/phabricator