Add minimum and maximum priority select boxes to Maniphest Custom Query.
Summary:
Added the boxes.
NOTE: I am not sure how to deal with the user choosing a minimum higher than the maximum; it causes an empty result set, but if we can avoid allowing it, that'd be better, I think.
Test Plan: See the boxes there, not filtering. Change them, see them filtering.
Reviewers: epriestley
CC: aran, Korvin
Maniphest Tasks: T1565
Differential Revision: https://secure.phabricator.com/D3109