R1:7629d4417587

Strip non-integers out of task id entries

Test Plan: search in task ids for `t123, 456, pickles` (assuming 123 and 456 exist), and you will see 123 and 456 listed. This is done in the buildQueryFromRequest function, so it would process a hand-written GET string just fine too.

Reviewers: epriestley

CC: aran, Korvin

Maniphest Tasks: T1365

Differential Revision: https://secure.phabricator.com/D2771