Update widget.queryeditor.js and widget.queryeditor.js

To be 508 compliant all form input fields need to have a label.
Reference: http://wac.osu.edu/tutorials/section508/forms.htm

Added css modification as well for the labels to remain hidden.
Merge pull request #413 from janette/508-complaint-patch

Update widget.queryeditor.js and widget.queryeditor.js