I should be able to enter input to pass to QL

(User Story, Closed -> Fixed, Priority: Critical, Test Status: No automated tests yet , Reported By Bad Link: Thing 3y284oe not found, )
Summary: The theory here is to add a _QLInput() function, which displays an input box and then passes that input to the given QL expression.
This is part of solving Eric's custom-search use case.