refact linux desktop env

Signed-off-by: fufesou <shuanglongchen@yeah.net>

src/platform/linux.rs

@@ -1,4 +1,3 @@
-use super::linux_desktop::{get_desktop_env, Desktop};
 use super::{CursorData, ResultType};
 use desktop::Desktop;
 pub use hbb_common::platform::linux::*;
@@ -297,6 +296,7 @@ fn force_stop_server() {
 pub fn start_os_service() {
     stop_rustdesk_servers();
     start_uinput_service();
+    start_check_desktop_env();
 
     let running = Arc::new(AtomicBool::new(true));
     let r = running.clone();
@@ -371,6 +371,8 @@ pub fn start_os_service() {
         }
     }
 
+    stop_check_desktop_env();
+
     if let Some(ps) = user_server.take().as_mut() {
         allow_err!(ps.kill());
     }