fix(core): tray not closing on Windows (#3351)

Author: lucasfernog

.changes/fix-tray-remove-windows.md

@@ -0,0 +1,6 @@
+---
+"tauri": patch
+"tauri-runtime-wry": patch
+---
+
+Reimplement `remove_system_tray` on Windows to drop the `SystemTray` to run its cleanup code.

core/tauri-runtime-wry/src/lib.rs

@@ -993,6 +993,7 @@ pub enum TrayMessage {
   UpdateIcon(Icon),
   #[cfg(target_os = "macos")]
   UpdateIconAsTemplate(bool),
+  Close,
 }
 
 #[derive(Debug, Clone)]
@@ -1565,7 +1566,7 @@ impl RuntimeHandle for WryHandle {
   #[cfg(all(windows, feature = "system-tray"))]
   /// Deprecated. (not needed anymore)
   fn remove_system_tray(&self) -> Result<()> {
-    Ok(())
+    send_user_message(&self.context, Message::Tray(TrayMessage::Close))
   }
 }
 
@@ -2205,6 +2206,11 @@ fn handle_user_message(
           tray.lock().unwrap().set_icon_as_template(is_template);
         }
       }
+      TrayMessage::Close => {
+        *tray_context.tray.lock().unwrap() = None;
+        tray_context.listeners.lock().unwrap().clear();
+        tray_context.items.lock().unwrap().clear();
+      }
     },
     Message::GlobalShortcut(message) => match message {
       GlobalShortcutMessage::IsRegistered(accelerator, tx) => tx