RFR: 8351867: No UI changes while iconified

[Martin Fox]

On Thu, 13 Mar 2025 10:36:40 GMT, John Hendrikx <jhendrikx at openjdk.org> wrote:

> Adds code to trigger a scene update when a Window is restored
> 
> This seems to solve https://bugs.openjdk.org/browse/JDK-8351867 and https://bugs.openjdk.org/browse/JDK-8146479

Test file attached. [drawdeiconify.patch](https://github.com/user-attachments/files/20165986/drawdeiconify.patch)

The test fails on all platforms without this PR. With this PR the test succeeds on Linux and Windows for regular windows and fails when de-iconifying to a maximized state. It also fails on Windows for TRANSPARENT stages since we never get a WM_PAINT message and so glass never calls notifyRepaint.

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PR Comment: https://git.openjdk.org/jfx/pull/1733#issuecomment-2873374444