RFR: 8267374: (macos) Left Option+Up/Down arrow dont traverse to beginning/end of line in textarea [v5]

[Prasanta Sadhukhan]

On Thu, 30 Jun 2022 22:41:16 GMT, Sergey Bylokhov <serb at openjdk.org> wrote:

> One macOS you will not see the "Alt" key as well, but we use that name.

At least I can see
![mac-keyboard-alt](https://user-images.githubusercontent.com/43534309/177146818-c4c17e1d-5f61-4c9c-9122-947606fc59c1.png)

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PR: https://git.openjdk.org/jdk/pull/9230