XNAT-2197, XNAT-2815: Added in filtering of PET tracer in cases where a session label is already specified.

Committed jars consist of commit in changeset: https://bitbucket.org/nrg/uploadassistant/commits/d46d18135a07b62234a44565d75500f3fa6b8d63
XNAT-2804 - Workflow Filter Hangs in IE (fixed input type invalid agument bug for IE)