Modal Dialog check thinks focus leaves dialog when it doesn't

Product: axe Extension

Expectation:

Using [`focus-trap`](https://github.com/focus-trap/focus-trap) to implement a dialog should return no issues with focus leaving the dialog.

Actual:

The Modal Dialog check is returning the issue "Keyboard focus is not maintained within the modal. It is possible to tab out of the modal". It does not give any insight into which element outside the dialog is able to be tabbed to. Considering I don't believe there are any elements outside the dialog that can be tabbed to (thanks to `focus-trap`), and I didn't see it tab to anything outside the dialog, this is either a faulty detection or it should provide more information for what element outside the dialog can be tabbed to.

Motivation:

I have no clue what element can be tabbed to outside the dialog, but presumably axe does know since it found one. It should tell me which element can be tabbed to outside the dialog.

axe-core version: 4.3.5

extension version: 4.22.1


Browser and Assistive Technology versions

Chromium: 98.0.4758.80

For Tooling issues:

- Platform:  Linux