Re-select the caps button after closing modal

[kannapples]

Description

During an accessibility audit of a project I work on that uses VideoJS we received the following feedback about how the focus is handled after closing the Caption Settings menu.

Users will expect to be returned to the item that activated the dialog when they close the dialog.
When a user closes the dialog, focus should be moved back to the menu item for "caption settings".
Keyboard focus does not return to the control which opened the dialog when it is closed.

Fixes #6949

Specific Changes proposed

When the TextTrackSettings modal is closed, the SubsCapsButton will be re-selected, and the captions menu list will be re-opened.

Requirements Checklist

• Feature implemented / Bug fixed
• If necessary, more likely in a feature request than a bug fix
  • Change has been verified in an actual browser (Chrome, Firefox, IE)
  • Unit Tests updated or fixed
  • Docs/guides updated
  • Example created (starter template on JSBin)
• Reviewed by Two Core Contributors

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[brandonocasey]

I see what you mean by this and what it fixes. I don't think we want to do it this way though. I think we would be better suited adding a modalclose listener in handleClick in CaptionSettingsMenuItem that calls pressButton on it's parent. We would need to do it this way because there are many types of captions menus.

[gkatsev]

@OwenEdwards is looking into whether this is something we want. We'll keep this PR open until we have more info from him.
#6949 (comment)

[OwenEdwards]

See #6949 - the current behavior is acceptable, so this fix is not needed.