Zenity 3.91.0
    - tree: Port to GtkColumnView (Logan Rathbone)
    - desktop file: Remove spurious translation comment (Logan Rathbone)
    - i18n: rename POTFILES to POTFILES.in (Piotr Drąg)
    - help: Fix invalid markup in German help translation (Andre Klapper)
    - help: Freedesktop.org spec fixes (Anders Jonsson)
    - Translation updates:
        Anders Jonsson (sv)
        Yuri Chornoivan (uk)
        Jürgen Benvenuti (de)
        Ekaterine Papava (ka)
        Kukuh Syafaat (id)
        Martin (sl)
        Aurimas Černius (lt)
        Aleksandr Melman (ru)
        Sergej A (ru)
        Sabri Ünal (tr)
        Anders Jonsson (sv)