Fix 'qubes.InstallUpdatesGUI' call

There is no 'verbose' parameter

QubesOS/qubes-issues#1249

qubesmanager/main.py

@@ -1384,7 +1384,7 @@ class VmManagerWindow(Ui_VmManagerWindow, QMainWindow):
                         msecs=3000)
                     vm.start()
                 vm.run_service("qubes.InstallUpdatesGUI", gui=True,
-                               verbose=False, wait=False)
+                               wait=False)
         except Exception as ex:
             thread_monitor.set_error_msg(str(ex))
             thread_monitor.set_finished()