Wayland: Release pressed events on application focus out

[Riteo]

Related to #100713

Looks like I always assumed wrongly that the compositor would send us key release events when unfocusing... It did not.

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To test this PR do this:

1. On an unpatched binary, just keep anything pressed and focus any other window, then release the key. Now notice how tooltips don't show anymore. Press and release the "stuck" key while keeping the game focused and bam, things work again.
2. On a patched binary, notice how this weird dance does not happen anymore ;)

[bruvzg]

Works as expected, also consistent with macOS, X11 and Windows display server behavior.

Note for testing: The issue seems to be specific to editor inspector tooltips, but not for simple tooltips of other controls (these are not affected by holding key at all).

[Repiteo]

Thanks!