Update SCTK to 0.11.0

* Update SCTK to 0.11.0

Updates smithay-client-toolkit to 0.11.0. The major highlight
of that updated, is update of wayland-rs to 0.27.0. Switching
to wayland-cursor, instead of using libwayland-cursor. It
also fixes the following bugs:

  - Disabled repeat rate not being handled.
  - Decoration buttons not working after tty switch.
  - Scaling not being applied on output reenable.
  - Crash when `XCURSOR_SIZE` is `0`.
  - Pointer getting created in some cases without pointer capability.
  - On kwin, fix space between window and decorations on startup.
  - Incorrect size event when entering fullscreen when using
    client side decorations.
  - Client side decorations not being hided properly in fullscreen.
  - Size tracking between fullscreen/tiled state changes.
  - Repeat rate triggering multiple times from slow callback handler.
  - Resizable attribute not being applied properly on startup.
  - Not working IME

Besides those fixes it also adds a bunch of missing virtual key codes,
implements proper cursor grabbing, adds right click on decorations
to open application menu, disabled maximize button for non-resizeable
window, and fall back for cursor icon to similar ones, if the requested
is missing.

It also adds new methods to a `Theme` trait, such as:
  - `title_font(&self) -> Option<(String, f32)>` - The font for a title.
  - `title_color(&self, window_active: bool) -> [u8; 4]` - The color of
  the text in the title.

Fixes #1680.
Fixes #1678.
Fixes #1676.
Fixes #1646.
Fixes #1614.
Fixes #1601.
Fixes #1533.
Fixes #1509.
Fixes #952.
Fixes #947.

src/platform_impl/linux/wayland/event_loop/proxy.rs

@@ -0,0 +1,32 @@
+//! An event loop proxy.
+
+use std::sync::mpsc::SendError;
+
+use sctk::reexports::calloop::channel::Sender;
+
+use crate::event_loop::EventLoopClosed;
+
+/// A handle that can be sent across the threads and used to wake up the `EventLoop`.
+pub struct EventLoopProxy<T: 'static> {
+    user_events_sender: Sender<T>,
+}
+
+impl<T: 'static> Clone for EventLoopProxy<T> {
+    fn clone(&self) -> Self {
+        EventLoopProxy {
+            user_events_sender: self.user_events_sender.clone(),
+        }
+    }
+}
+
+impl<T: 'static> EventLoopProxy<T> {
+    pub fn new(user_events_sender: Sender<T>) -> Self {
+        Self { user_events_sender }
+    }
+
+    pub fn send_event(&self, event: T) -> Result<(), EventLoopClosed<T>> {
+        self.user_events_sender
+            .send(event)
+            .map_err(|SendError(error)| EventLoopClosed(error))
+    }
+}