Rename headers in Administration menu

[hhromic]

Is your feature request related to a problem? Please describe

Hello, I think the wording for the headers under the "Administration" menu can be improved.
In particular, the User-related and Environment-related headers are not natural to read and break the style with the rest.

I am aware that the main reason for such "exotic" header names is the unfortunate "collision" with the main "Users" and "Environments" section names inside each header, if the same labels where to be used for the headers.

Consider the screenshot below, taken from the latest Portainer 2.42.0 STS version to illustrate the current situation:

Describe the solution you'd like

I think better wording for these header names should be used for a better look/feel of Portainer.

I suggest/propose to rename these headers back to their natural Users and Environments names, and rename the sections inside as something like Overview to remove the naming collision that would occur. For example:

* Administration
  * Users
    * Overview
    * Teams
    * Roles
  * Environments
    * Overview
    * Groups
    * Tags
  * Registries
  * Logs

I am aware that renaming the Users and Environments sections to something else is "inconsistent" with the underlying page names. But I guess is the cost to pay for this unfortunate naming collision.

Another proposal could be for the header itself, when clicked, to directly go to the respective first page, like it used to be in older Portainer versions, but I understand the underlying web framework does not support this easily, and that's why it now works the way it does.

Other name proposals instead of Overview are welcome of course. For example, Management or XYZ List.

For the case of "Environments", the header name could be Infrastructure and keep the page name as it is:

* Administration
  * Infrastructure
    * Environments
    * Groups
    * Tags

Describe alternatives you've considered

See section above.

Additional context

No response