Unpin & upgrade winit to 0.30.5 (#4939)

This updates winit to 0.30.5. 

https://github.com/emilk/egui/pull/4849 Had to pin the version to
0.30.2, as a Winit patch changed the behavior of selecting a theme.
Winit 0.30.5 reverts this, so we could stick with `window.theme()`, but
the newly added `ActiveEventLoop::system_theme` is more like what egui
wants anyway, as individual windows can have theme overrides.

Also bump `smithay-clipboard` to prevent some now duplicate
dependencies.

crates/egui_glow/examples/pure_glow.rs

@@ -192,8 +192,7 @@ impl winit::application::ApplicationHandler<UserEvent> for GlowApp {
         let gl = std::sync::Arc::new(gl);
         gl_window.window().set_visible(true);
 
-        let egui_glow =
-            egui_glow::EguiGlow::new(event_loop, &gl_window.window, gl.clone(), None, None, true);
+        let egui_glow = egui_glow::EguiGlow::new(event_loop, gl.clone(), None, None, true);
 
         let event_loop_proxy = egui::mutex::Mutex::new(self.proxy.clone());
         egui_glow

crates/egui_glow/src/winit.rs

@@ -24,7 +24,6 @@ impl EguiGlow {
     /// For automatic shader version detection set `shader_version` to `None`.
     pub fn new(
         event_loop: &winit::event_loop::ActiveEventLoop,
-        window: &winit::window::Window,
         gl: std::sync::Arc<glow::Context>,
         shader_version: Option<ShaderVersion>,
         native_pixels_per_point: Option<f32>,
@@ -43,7 +42,7 @@ impl EguiGlow {
             ViewportId::ROOT,
             event_loop,
             native_pixels_per_point,
-            window.theme(),
+            event_loop.system_theme(),
             Some(painter.max_texture_side()),
         );