Log Message:
Update to 2.3.0beta3:

* 2.3.0beta3 (development)

    * The vertical padding of the folder view was reduced.
    * The change between folders became faster at GTK+ 2.10.x.
    * The bug that the window was kept hidden from taskbar on popup with
      another process when the window was minimized to tray was fixed.
    * The text insertion by the action was fixed again.
    * The height of the statusbar was adjusted.
    * The padding of the folder view was reduced.