install service period protection

how to reproduce:
install, click stop service, click start service and click no
on uac, it'll show "Service is not running" but can be connected.

Signed-off-by: 21pages <pages21@163.com>

src/platform/linux.rs

@@ -1074,7 +1074,7 @@ mod desktop {
 
         pub fn refresh(&mut self) {
             if !self.sid.is_empty() && is_active_and_seat0(&self.sid) {
-                     return;
+                return;
             }
 
             let seat0_values = get_values_of_seat0(&[0, 1, 2]);
@@ -1183,6 +1183,7 @@ pub fn uninstall_service(show_new_window: bool) -> bool {
 }
 
 pub fn install_service() -> bool {
+    let _installing = crate::platform::InstallingService::new();
     if !has_cmd("systemctl") {
         return false;
     }