- Clarify that 'mm-glib' dep is for ModemManager (not Network
Manager which is below). The comment also helps people
which may confuse it with glibmm library.
- Fix following Meson warning about two deprecated functions:
WARNING: Deprecated features used:
* 0.56.0: {'dependency.get_pkgconfig_variable', 'meson.source_root'}
This adds tests for the network panel based on the test service found in
NetworkManager. Another possible solution may be to use the one from
dbusmock, however NetworkManager already has readily available code to
write tests in C which makes checking the widget hierarchy easier.
