Changes Draft to extend Content instead of Record so that it's searchable.
Makes sure that types with @ToolUi.Hidden applied to them don't show in type select boxes and search results.
Changes UnpublishDrafts to use Solr.
Hardcodes Search and ToolPageContext#writeTypeSelect to hide only Draft instances since @ToolUi.Hidden doesn't seem to be working correctly.
Changes the initial UnpublishDrafts query that hides the module to use Solr as well.
Adds paths as a field display option in ContentSearchAdvanced.
Merge branch 'release/2.1'