Now that wi-fi devices will be handled by a separate menu toggle
instead of as part of a combined system menu, there is no longer
a need of delegating network selection to a separate dialog.
To keep the menu from growing too much, the (sorted) list of
displayed networks is kept at a limit of eight. There is always
Settings for a complete list…
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/2407>