Only start websocket connections if needed

src/mainwindow.h

@@ -46,6 +46,9 @@ public:
     void setDefaultPayFrom();
 
     void replaceWormholeClient(WormholeClient* newClient);
+    bool isWebsocketListening();
+    void createWebsocket();
+    void stopWebsocket();
 
     Ui::MainWindow*     ui;
 
@@ -107,8 +110,6 @@ private:
 
     void restoreSavedStates();
 
-    void createWebsocket();
-
     WSServer*       wsserver = nullptr;
     WormholeClient* wormhole = nullptr;