[jfx25] RFR: 8359601: Fix window button states of an extended stage

[Kevin Rushforth]

On Fri, 25 Jul 2025 13:10:03 GMT, Michael Strauß <mstrauss at openjdk.org> wrote:

> 8359601: Fix window button states of an extended stage

As noted in the mainline PR, this is a good fix to backport to jfx25. The backport is clean.

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Marked as reviewed by kcr (Lead).

PR Review: https://git.openjdk.org/jfx/pull/1855#pullrequestreview-3058038878