2.1.0
Changed the sorting behavior for items with undefined attributes:
- sorting by bookmarks, item w/o bookmark status pushed to the bottom in both: asc and desc orders
- sorting by metadata, item w/o relevant metadata pushed to the bottom in both, asc and desc orders
- sorting by creation or modification date, advanced mode: empty folders (or folders having only folder children) are pushed to the bottom, regardless of asc or desc order