Update AccessKit

[tronical]

Fixes #8148

[tronical]

cc @DataTriny

[DataTriny]

I'll have a look this evening.

[tronical]

Ah yes, the CI shows what I can see locally now, too: There's an additional condition in access kit now, that makes it panic when the adapter is created after the window was marked as shown. This PR delays creation until we have an active event loop (as required by the new API), but it can't delay the set_visible() call.

There's no shortcut then :-(. For this update to work I'll have to complete the surgery on the entire window creation. That's too risky for me right now so close to the release.

We need the resume protocol to fix this issue, wayland fullscreen support, and for iOS. I probably should've implemented this earlier, but I down-prioritised it :( - apologies.

I'll go ahead and implement this after the release next week, then there's enough time to fix issues that will (most likely) arise from this.

[DataTriny]

The panic is not a new requirement, it is a stricter way of enforcing that the window is indeed shown only after the AccessKit adapter is created. We have found this bug in the wild, but I am surprized that Slint was also affected.

While unfortunate, I understand the risk involved in doing this right before a release.