Implement common Std traits on many types (#3796)

src/platform_impl/apple/uikit/event_loop.rs

@@ -112,7 +112,7 @@ impl rwh_06::HasDisplayHandle for ActiveEventLoop {
     }
 }
 
-#[derive(Clone)]
+#[derive(Clone, PartialEq, Eq)]
 pub(crate) struct OwnedDisplayHandle;
 
 impl OwnedDisplayHandle {

src/platform_impl/apple/uikit/window.rs

@@ -702,7 +702,7 @@ impl From<&AnyObject> for WindowId {
     }
 }
 
-#[derive(Clone, Debug, Default)]
+#[derive(Clone, Debug, Default, PartialEq)]
 pub struct PlatformSpecificWindowAttributes {
     pub scale_factor: Option<f64>,
     pub valid_orientations: ValidOrientations,