Update to 2.5.1
    
    - Update translations from zanata (de, ja, fr, pl updated)
    - Show also dictionary when “Show status in auxiliary text” is on
    - Set notebook in setup tool to scrollable
    - Make filter for dictionary selection work for language descriptions if langtable available
    - Show names of languages and territories in setup tool if langtable is available
    - Add missing flag for csb_PL
    - Add option to automatically select the best candidate
    - Pressing Shift should not immediately change the case mode of the candidates