Qube Manager now reacts to changing some global properties

Properties checked are: default_netvm and default_dispvm. Qube Manager
will now properly update displayed values.

fixes QubesOS/qubes-issues#5328

qubesmanager/qube_manager.py

@@ -617,7 +617,14 @@ class VmManagerWindow(ui_qubemanager.Ui_VmManagerWindow, QtWidgets.QMainWindow):
 
     def on_domain_changed(self, vm, event, **_kwargs):
         if not vm:  # change of global properties occured
+            if event.endswith(':default_netvm'):
+                for vm_row in self.vms_in_table.values():
+                    vm_row.update(event='property-set:netvm')
+            if event.endswith(':default_dispvm'):
+                for vm_row in self.vms_in_table.values():
+                    vm_row.update(event='property-set:default_dispvm')
             return
+
         try:
             self.vms_in_table[vm.qid].update(event=event)
         except exc.QubesPropertyAccessError: