libadwaita-demo-1.5.0-alt1.x86_64	freedesktop-desktop	info	desktop-file-validate utility printed the following message(s): /usr/share/applications/org.gnome.Adwaita1.Demo.desktop: hint: value "GTK;" for key "Categories" in group "Desktop Entry" does not contain a registered main category; application might only show up in a "catch-all" section of the application menu;