unmountOnHide doesn't respect closing animation when Dialog is used without explicit store

[Dremora]

Current behavior

Closing a dialog that has open, onClose and unmountOnHide props (see example below) doesn't wait for the closing animation before unmounting. When using store and unmountOnHide props, everything works as expected.

Steps to reproduce the bug

1. Open https://stackblitz.com/edit/gntorz?file=dialog-animated%2Fstyle.css,dialog-animated%2Findex.tsx&theme=dark
2. Click the first button and then dismiss the dialog - it animates correctly
3. Click the second button and then dismiss the dialog - there's no closing animation

Expected behavior

Dialogs should finish animation regardless of whether store is passed as a prop or is created internally.

Workaround

Construct useStore manually.

#3403 (comment)

Possible solutions

No response

[diegohaz]

At the moment, if a store isn't provided (either through the store prop or by wrapping the dialog with DialogProvider), the Dialog's open prop is the sole data available for unmountOnHide to determine whether it should unmount the underlying component.

This ensures we run as little code as possible when the dialog is unmounted. But we can potentially support this in the future.