7.x escape solr

* When a query was specified to not be the default *:* it was not being escaped. This has been fixed.
* Query for the PID and or the URI for collection searching. This could have possibly been a bug where if the Solr field that contains the RELS-EXT entries for isMemberOf or isMemberOfCollection returned a URI it would not be flagged as a valid result.
* Updated the admin UI to no longer accept a prefix and now just looks for fields to search through.