Make xdg-shell's app_id match GApplication's application-id property
Make xdg-shell's app_id match GApplication's application-id property
In order to make GTK+4 conform to the xdg-shell protocol (and therefore make it simpler for compositors to match applications to desktop files in Wayland) this MR:
- revert e1fd8772
- adjusts the migration docs
- adjusts the examples
- adjusts the demos
According to @matthiasc this is enforced for flatpaks already.