status/network: Sync active connections again on connection-added
NetworkManagers NmClient has a bug for wireguard connections where the notify::active-connections and connection-added are emitted in the wrong order: When a wireguard connection gets activated, notify::active-connections is emitted first, then connection-added happens.
We currently expect these signals to emitted in the correct order, so our VPN toggle is not actually updated when a wireguard connection is established.
Until this bug is fixed in NetworkManager, work it around by calling _syncActiveConnections() manually after we see ::connection-added.
NM issue: https://gitlab.freedesktop.org/NetworkManager/NetworkManager/-/issues/1483
Closes: #6656 (closed)