Clean up label and description for Indexing Options tab.
Structure plugin forms/fields correctly.
Don't show facets and facet filters when there is no query and no
applied filters.
Allow for more control over how facets are indexed (I.e.
case-sentivity).
Don't encodehandle utf8; Solr seems to handle it.
Provide additional (Joomla core) params for configuring the Browse
interface.