Do not check if XDG_CURRENT_DESKTOP is gnome for wayland screenshare now that we use pipewire screen
Hi
So I'm using Flatpak Zoom with KDE. Zoom wouldn't allow me to use the screenshare function unless I use the XDG_CURRENT_DESKTOP=gnome environment variable, which from what I know is the check for the old implementation where the app uses a Hack in Mutter (Gnome compositor) to do screen share. Since now it's done via pipewire with xdg desktop portal, having Gnome or this environment variable as a requirement is unnecessary and affect the ease of use of Zoom for users with other Wayland Desktop. Please Fix
