See https://github.com/flathub/flathub/wiki/AppData-Guidelines#icons-and-categories

gajim.desktop isn't provided since 1.0.0.
The change might fix detection of Gajim nightly in GNOME software.

- Remove GNOME as Gajim is not related to the GNOME project
- Add Chat as Categorie
- Set StartupNotify=false because we really dont do what the spec wants from us if this is true
- Remove StatupWMClass because we change the window title often
- Add X-GNOME-UsesNotifications=true it tells GNOME that Gajim uses notifications

André authored 5 years ago and Yann Leboulanger committed 5 years ago

See https://blogs.gnome.org/hughsie/2013/10/01/copyright-in-appdata-files/ for details.