NM + Network: Cleanup network state updates

- Use the pygobject signals to properly check whether we have the
correct UUID
- Delete polling every second as that is hopefully not useful any more
- Delete unknown state retry mechanism for the same reason
- Should fix eduvpn#464 and hopefully eduvpn#492

eduvpn/app.py

@@ -15,9 +15,6 @@
 
 logger = logging.getLogger(__name__)
 
-CHECK_NETWORK_INTERVAL = 1  # seconds
-
-
 class ApplicationModel:
     def __init__(self, common: EduVPN):
         self.common = common
@@ -175,6 +172,6 @@ def initialize_network(self):
             pass
 
         def on_network_update_callback(state):
-            network.on_state_update_callback(self, state)
+            print("Network state update")
 
         nm.subscribe_to_status_changes(on_network_update_callback)

eduvpn/ui/ui.py

@@ -17,7 +17,6 @@
 from gi.repository import Gtk, GObject, GdkPixbuf
 
 from ..settings import HELP_URL
-from .. import network as network_state
 from ..server import CustomServer, StatusImage
 from ..app import Application
 from ..nm import nm_available, nm_managed