Remove T from EventLoopTargetWindow (#3081)

Co-authored-by: nerditation <12248559+nerditation@users.noreply.github.com>

src/platform_impl/web/event_loop/proxy.rs

@@ -1,24 +1,30 @@
+use std::sync::mpsc::Sender;
+
 use super::runner;
 use crate::event::Event;
 use crate::event_loop::EventLoopClosed;
 use crate::platform_impl::platform::r#async::Channel;
 
 pub struct EventLoopProxy<T: 'static> {
-    runner: Channel<runner::Shared<T>, T>,
+    // used to wake the event loop handler, not to actually pass data
+    runner: Channel<runner::Shared, ()>,
+    sender: Sender<T>,
 }
 
 impl<T: 'static> EventLoopProxy<T> {
-    pub fn new(runner: runner::Shared<T>) -> Self {
+    pub fn new(runner: runner::Shared, sender: Sender<T>) -> Self {
         Self {
             runner: Channel::new(runner, |runner, event| {
                 runner.send_event(Event::UserEvent(event))
             })
             .unwrap(),
+            sender,
         }
     }
 
     pub fn send_event(&self, event: T) -> Result<(), EventLoopClosed<T>> {
-        self.runner.send(event);
+        self.sender.send(event).unwrap();
+        self.runner.send(());
         Ok(())
     }
 }
@@ -27,6 +33,7 @@ impl<T: 'static> Clone for EventLoopProxy<T> {
     fn clone(&self) -> Self {
         Self {
             runner: self.runner.clone(),
+            sender: self.sender.clone(),
         }
     }
 }