fix(Tabset): reset tabset to current tab when first tab is removed

Description

Tabset is not resetting back, when first tab is removed.

[X] For UI changes, did you manually test in recent versions of modern browsers (Chrome, Firefox, and Safari)?
[ ] For UI changes, did you manually test in IE11 and legacy Edge?
[X] Did you add component tests for any new code?
[X] Did you run the component unit tests via yarn test to ensure all tests passed?
[X] Did you include a screenshot of the component tests?
[ ] If you changed/added functionality, did you update the demo page and documentation?
[ ] If needed, did you add or modify the demo test page to test the changed/added functionality?
[ ] Did you assign reviewers?
[ ] In Jira, have you linked to this PR on the ticket(s)?

Before tabset

After tabset-new