quickshell: drop support for 0.2, require 0.3+

- Remove all compat code
- Rewire LegacyNetworkService to use Quickshell.Networking
- Add parentWindow to settings child windows

core/cmd/dms/shell.go

@@ -202,9 +202,6 @@ func runShellInteractive(session bool) {
 		}
 	}
 
-	// ! TODO - remove when QS 0.3 is up and we can use the pragma
-	cmd.Env = append(cmd.Env, "QS_APP_ID=com.danklinux.dms")
-
 	if isSessionManaged && hasSystemdRun() {
 		cmd.Env = append(cmd.Env, "DMS_DEFAULT_LAUNCH_PREFIX=systemd-run --user --scope")
 	}