Drop "-pro" suffix and "editpro" URIs for EditEngine in Maniphest

Summary: Ref T9908. Move all the "pro" stuff into the old locations.

Test Plan: Created/edited tasks, looked at URIs, saw non-pro ones. Grepped for editpro.

Reviewers: chad

Reviewed By: chad

Maniphest Tasks: T9908

Differential Revision: https://secure.phabricator.com/D14717