update to 1.5.7
    
    - Pull translations from Zanata (de, pl, uk updated)
    - Make the list of characters to auto commit configurable
      (Empty list by default)
    - Fix duplicates in the candidate list caused by overwriting
      input_phrase with the NFC version
    - Don’t show the special candidates for missing dictionaries for
      Japanese and Chinese
    - Implement do_cursor_up() and do_cursor_down() to make scrolling
      the lookup table with the mouse wheel work (Needs also a patch in ibus)
    - Add an “Off the record mode” (also gets a property menu)
    - Tooltips don’t seem to work on sub-properties, remove the tooltips there
    - Add a property menu for the emoji prediction mode
    - Make triggering a commit with “Left” or “Control+Left” work
      correctly in “Tab enable mode ” again
    - Down, Up, Page_Down, and Page_Up should trigger a commit and
      be passed to the application if possible
    - If “☑ Enable suggestions by Tab key” is on make it possible
      to close the lookup table with Escape but keep the preëdit
    - If “☑ Enable suggestions by Tab key” is on, don’t autocommit digits
    - Make autocommitting much more rare (for characters which are not
      the first typed character)
    - Don’t autocommit the first typed character unless absolutely necessary
    - Even when “☑ Enable suggestions by Tab key” is used,
      don’t complete empty strings