change tray icon click behavior

wallitor-gui/src-tauri/src/lib.rs

@@ -16,6 +16,9 @@ pub fn run() {
             if let Ok(true) = window.is_minimized() {
                 let _ = window.unminimize();
             }
+            if let Ok(false) = window.is_visible() {
+                let _ = window.show();
+            }
             let _ = window.set_focus();
         }))
         .plugin(tauri_plugin_fs::init())