qt: GUI support for -disablewallet mode

src/qt/bitcoingui.h

@@ -108,6 +108,9 @@ private:
     /** Create system tray menu (or setup the dock menu) */
     void createTrayIconMenu();
 
+    /** Enable or disable all wallet-related actions */
+    void setWalletActionsEnabled(bool enabled);
+
 signals:
     /** Signal raised when a URI was entered or dragged to the GUI */
     void receivedURI(const QString &uri);