Hide top listbox quick search as it duplicates with global one and uses spaces, leave bottom listbox quick search as a convenient way to do a quick search after viewing show found page results.
Use separate method for sub query searches which reuses main one.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@36735 20353a03-c40f-0410-a6d1-a30d3c3de9de