native NetworkManager + all native dbus bindings via dms

- Scrap janky NetworkService in favor of, dms' native NM integration
  socket
- Scrap all gdbus usage in favor of native dbus bindings in dms
  (loginctl, freedesktop)

It means that - some features won't work if running without dms wrapper.

But the trade off is certainly worth it, in the long-run for efficiency
improvements.

Modules/DankBar/Popouts/VpnPopout.qml

@@ -13,6 +13,10 @@ import qs.Widgets
 DankPopout {
     id: root
 
+    Ref {
+        service: VpnService
+    }
+
     property var triggerScreen: null
 
     function setTriggerPosition(x, y, width, section, screen) {