Fixed issue with "df" field not correctly handled in Solr queries.
Fixed issue with "df" field not correctly handled in Solr queries.

Now for querying results, the orginal query is copied and manipulated
instead of copying only relevant parts. This should avoid that relevant
parts are missed.
gallardo/opencms-core,gallardo/opencms-core,alkacon/opencms-core,alkacon/opencms-core,alkacon/opencms-core,gallardo/opencms-core,alkacon/opencms-core,gallardo/opencms-core