qt: network status text to tell user proxy is enabled when network can't connect

gui/qt/main_window.py

@@ -733,7 +733,10 @@ class ElectrumWindow(QMainWindow, MessageBoxMixin, PrintError):
                 else:
                     icon = QIcon(":icons/status_connected_proxy.png")
         else:
-            text = _("Not connected")
+            if self.network.proxy:
+                text = "{} ({})".format(_("Not connected"), _("proxy enabled"))
+            else:
+                text = _("Not connected")
             icon = QIcon(":icons/status_disconnected.png")
 
         self.tray.setToolTip("%s (%s)" % (text, self.wallet.basename()))