On macOS, add WindowExtMacOS::reset_cursor_rect

[wusyong]

What kind of change does this PR introduce?

• Bugfix
• Feature
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• New Binding issue #___
• Code style update
• Refactor
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Does this PR introduce a breaking change?

• Yes, and the changes were approved in issue #___
• No

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• When resolving issues, they are referenced in the PR's title (e.g fix: remove a typo, closes #___, #___)
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[amrbashir]

I am not sure if this fix will be accepted upstream, how would this be used in WRY btw?

[wusyong]

@amrbashir wry will call window.reset_cursor_rect(false) internally when creating webview.
I don't know if upstream would accept either. But this is the only I can think of without replacing TaoView.
Replacing TaoView will lose lost of WindowEvent including resize event.

[amrbashir]

calling window.reset_cursor_rect(false) will effectively disable window.set_cursor_icon()?

[wusyong]

Yes, this is resetCursorRects: is used for loading custom cursor in TaoView.
Wen set_cursor_icon is called, it will invoke invalidateCursorRectsForView: which will trigger resetCursorRects:

[amrbashir]

I don't think users will appreciate disabling the window.set_cursor_icon, maybe window.set_cursor_icon could be changed to take Option<CusrsorIcon> and calling it with None variant will make tao/winit fallback to the system behavior.

[wusyong]

Closed this in favor of #614