Update to 2.6.0
    
    - Update translations from zanata (de updated)
    - Update emoji annotations from CLDR
    - When Left or BackSpace trigger a commit, forward Left events only
      when no candidate was selected (i.e. the preëdit was committed)
    - If a candidate is shown inline and *manually* selected, show the caret
      at the end of the candidate
    - Right, Left, BackSpace, and Delete edit the preëdit only if no
      candidate is *manually* selected
    - If an input char is typed while a candidate is *manually* selected,
      add that input to the candidate
    - Change option name 'Add a space when committing by label or mouse'
      in setup tool
    - Remove option “Use digits as select keys”
    - Make key bindings to commit or remove candidates via label configurable
      (Resolves: https://github.com/mike-fabian/ibus-typing-booster/issues/48)
    - Multi word suggestions: Commit the current commit phrase and the
      previous phrase as a single unit as well
      (Resolves: https://github.com/mike-fabian/ibus-typing-booster/issues/49)
    - Fix wrong tooltip for “Automatically select the best candidate” option
    - Run time consuming tests simultaneously via script (thanks to
      Marguerite Su <i@marguerite.su>)