Extracts the descriptive label of a query folder, the part before its _qid: marker (the id, user, and no-hits suffixes are all dropped).
_qid:
Query folder name (<desc>_qid:<id>[_<user>][_no-hits]).
<desc>_qid:<id>[_<user>][_no-hits]
The label, or the folder unchanged when it carries no marker.
Extracts the descriptive label of a query folder, the part before its
_qid:marker (the id, user, and no-hits suffixes are all dropped).