Avoid various systemd dependencies

--- data/cosmic.desktop.orig	2024-01-29 00:48:40 UTC
+++ data/cosmic.desktop
@@ -1,7 +1,7 @@ Commment=This session logs you into Cosmic
 [Desktop Entry]
 Name=Cosmic
 Commment=This session logs you into Cosmic
-Exec=/usr/bin/cosmic-service
+Exec=cosmic-comp
 Type=Application
 DesktopNames=pop:COSMIC
 X-GDM-SessionRegisters=false
\ No newline at end of file
--- src/main.rs.orig	2024-09-23 09:13:21 UTC
+++ src/main.rs
@@ -87,6 +87,11 @@ fn main() -> Result<()> {
     logger::init_logger()?;
     info!("Cosmic starting up!");
 
+    // Advise xdg-desktop-portal which *-portals.conf to load
+    std::env::set_var("XDG_CURRENT_DESKTOP", "COSMIC");
+    // Mimic wlroots, used by https://github.com/qt/qtbase/commit/4b4870a12cd9
+    std::env::set_var("XDG_SESSION_TYPE", "wayland");
+
     #[cfg(feature = "profile-with-tracy")]
     profiling::tracy_client::Client::start();
     profiling::register_thread!("Main Thread");