Move logic out of GroupingTabWidget

[MohamedAlmaki]

Description of work

This PR moves some logic from GroupingTabView to GroupingTabPresenter and adds unit tests for the new function in the presenter.

Fixes #38103.

To test:

• Make sure the new unit tests pass

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[thomashampson]

Marking this as draft while I fix the tests

[yusufjimoh]

The code changes look good, code built successful locally, and all unit tests passed. no release notes are needed, happy to approve the pull request.

[robertapplin]

Thanks for your work on this! The view now contains very little logic, and the logic that it used to have has been moved to the presenter and is under test 👍