[BUG] Click and Button Presses don't work on Windows CI with `pympl` dependency

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If someone had just a moment, it would be tremendously helpful to get some feedback about the failed CIs here https://github.com/mne-tools/mne-python/pull/10913. Basically, the tests that use fake clicking and key presses with `matplotlib` fail when `ipympl` is added as a dependency but only on `Windows`. I've checked and they pass locally on `MacOS` as well as on the CIs. Is there some global variable or setting that `ipympl` might be modifying and maybe we could change it back? The difference between all the 22 tests failing and all the tests passing was just adding `ipympl` to the dependencies list, it was run before and after adding those. Thanks!

Commencez par la CI Windows en échec dans pull request #10913 et identifiez les 22 tests qui simulent des clics et des pressions de touches dans matplotlib. Comparez les exécutions avant et après l’ajout de ipympl aux dépendances, puis déterminez quelle modification permet à ces tests de réussir sous Windows avec la dépendance présente.

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