no duplidate trays

src/core_main.rs

@@ -160,7 +160,9 @@ pub fn core_main() -> Option<Vec<String>> {
                 return None;
             }
         } else if args[0] == "--tray" {
-            crate::tray::start_tray();
+            if !crate::check_process("--tray", true) {
+                crate::tray::start_tray();
+            }
             return None;
         } else if args[0] == "--service" {
             log::info!("start --service");