We only want to render the account link and login items in the header.
And we want only render the Multitenancy and Administrators sections in
the admin sidebar.
We include the administrators management so it's possible to give
permissions to other users to manage tenants.
In order to restrict access to other sections by typing the URL or
following a link, we're only enabling the rest of the routes when we
aren't in the multitenancy management mode.
Until now, people had to edit the original route files in order to add
custom routes.
This was inconsistent with the other customizations, since we use custom
folders or files for customizing controllers, components, views, ...
(which you usually customize as well when adding a new route).
So now we're providing a file for custom routes, which will make it
easier to know which routes are not present in Consul Democracy by
default.
