Navigation is included only for super admin users

[sinansonmez]

What? Why?

Closes #8546

I previously added navigation for pages (#8395). This created another issue that navigation is shown also to regular users. In this PR I am checking if the user is super admin then shows the navigation. In addition pages mentioned in the issue, I included the super admin user check to all pages which I previously added navigation.

Release notes

Show navigation if user is super admin

Changelog Category: User facing changes

Before

Screen.Recording.2021-12-02.at.11.43.13.mov

After

Screen.Recording.2021-12-02.at.11.43.51.mov

[mkllnk]

Okay, that looks good to me.

Since it's inherent to the menu that it should only be displayed to admin users, I'm wondering if the if should have gone inside the partial. Less code and less room for error in the future. But this is okay, too.

[jibees]

LGTM.
I'd add some specs, but we should merge quickly this one.

[filipefurtad0]

Hey @sinansonmez,

After staging, we can see, that in the BO:

• as an admin (i.e., as a Hub, or producer), the navigation menu is not displayed anymore when editing shipping- and payment-methods
  Below: left, before this PR; right, after this PR

• as a superadmin
  i) the navigation menu is displayed when editing shipping- and payment-methods

ii) the navigation menu is displayed in the Configuration page and in all sub-pages (as introduced by #8395):

Thanks for fixing this ❤️