Revert "Removed progress wait when updating template"

This reverts commit 9633f6e9c6.

qubesmanager/qube_manager.py

@@ -976,6 +976,20 @@ class VmManagerWindow(ui_qubemanager.Ui_VmManagerWindow, QtGui.QMainWindow):
         thread.daemon = True
         thread.start()
 
+        progress = QtGui.QProgressDialog(
+                self.tr(
+                    "<b>{0}</b><br>Please wait for the updater to "
+                    "launch...").format(vm.name), "", 0, 0)
+        progress.setCancelButton(None)
+        progress.setModal(True)
+        progress.show()
+
+        while not t_monitor.is_finished():
+            self.qt_app.processEvents()
+            time.sleep(0.2)
+
+        progress.hide()
+
         if vm.qid != 0:
             if not t_monitor.success:
                 QtGui.QMessageBox.warning(