update to 1.5.26
    
    - Update translations from zanata (de updated)
    - Fix display of warning message when a dictionary is not installed.
    - Emulate xdg.BaseDirectory.save_data_path() on systems which lack pyxdg
    - Show the skin tone popover also on a long press gesture
    - Fix pyhunspell support
      Resolves: https://github.com/mike-fabian/ibus-typing-booster/issues/5#issuecomment-286251818