RFR: 8353599: TabPaneSkin: add 'menuGraphicFactory' property

[Andy Goryachev]

On Wed, 16 Apr 2025 20:03:14 GMT, Michael Strauß <mstrauss at openjdk.org> wrote:

> default factory should not be a `null` value.

oh, I see.  I think it makes the life easier, since there is no need to publish the pointer to the deficient `DEFAULT_FACTORY`.

This property can be qualified with "override" to make it clearer (though longer).

`menyGraphicFactoryOverrideProperty`

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PR Comment: https://git.openjdk.org/jfx/pull/1773#issuecomment-2810650953