fix(spatial-navigation): keep navigation going when player has an error (#8805)

## Description
The bug:
 Focus is lost when playback error is displayed.

This small PR will update the spatial-navigation logic so when the error
modal is shown the spatial-navigation will try to focus the components
present in the error modal, in most cases this will be the vjs close
button.

## Specific Changes proposed
Keep navigation working when player shows the error modal by focusing a
component in that modal.

## Requirements Checklist
- [x] 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](https://codepen.io/gkatsev/pen/GwZegv?editors=1000#0))
- [ ] Has no DOM changes which impact accessiblilty or trigger warnings
(e.g. Chrome issues tab)
  - [ ] Has no changes to JSDoc which cause `npm run docs:api` to error
- [ ] Reviewed by Two Core Contributors