Fix debugusergroup for the superuser group

[chmst]

Pull Request for Issue #44416 .

Summary of Changes

The group of super users has all permissions per default, this is why the check for permission fails.
The PR sets a switch for super user Group.

Remark:
As the super user has all permissions, we as well could remove the "show permissions " link in the Groups list.
Probably this would look like a bug "misssing permission button" for novice users, so I have chosen this solution.

Testing Instructions

See #44416.
Check the group permissions of different groups, not only the super user group, before and after patch.

Actual result BEFORE applying this Pull Request

see #44416.

Expected result AFTER applying this Pull Request

The super user has all permissions

Link to documentations

Please select:

• Documentation link for docs.joomla.org:

• No documentation changes for docs.joomla.org needed

• Pull Request link for manual.joomla.org:

• No documentation changes for manual.joomla.org needed

[Quy]

I have tested this item ✅ successfully on bae022a

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[fgsw]

I have tested this item ✅ successfully on bae022a

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_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/44419.}

[Quy]

RTC

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_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/44419.}

[HLeithner]

I would say it's expected behavior to not show all checkboxes green, since super user is a completely different thing it's also marked at the top line correctly. If you would like to see the permissions of a super user you can't see it anymore after this.

This PR is wrong and the bug is not a bug instead it's feature. I would suggest to close this.

[chmst]

I don't agree that it is intended behaviour to se that the super user group has no permission for anything. But will happy to test a better solution for this issue.