Refactor Network and Blockchain dialogs in qt and kivy

gui/qt/main_window.py

@@ -265,6 +265,8 @@ class ElectrumWindow(QMainWindow, MessageBoxMixin, PrintError):
     def on_network(self, event, *args):
         if event == 'updated':
             self.need_update.set()
+            self.emit(QtCore.SIGNAL('updated'), event, *args)
+
         elif event == 'new_transaction':
             self.tx_notifications.append(args[0])
         elif event in ['status', 'banner', 'verified', 'fee']: