- Add mime icons in the mime-editor treeview.
- Store window and column sizes in xfconf.
- Add cateogry based settings manager.
- Re-add support for pluggable dialogs and enable them always.
- Rework settings editor.
- Clear out keyboard shortcuts before resetting to defaults (bug #8138).
- Updated translations: ar, ca, cs, da, de, es, id, it, kk, lt, nl,
  nn, pt, ru, tr, uk, zh_CN, zh_TW.