Added new filter options for filtering based on the bibliographic level of a record.
Added new filter options for filtering based on the bibliographic level of a record.

ubtue/ub_tools,ubtue/ub_tools,ubtue/ub_tools,ubtue/ub_tools,ubtue/ub_tools,ubtue/ub_tools,ubtue/ub_tools,ubtue/ub_tools