DolphinWX: Enable/disable config UI options based on core state

Source/Core/DolphinWX/WxEventUtils.h

@@ -0,0 +1,17 @@
+// Copyright 2016 Dolphin Emulator Project
+// Licensed under GPLv2+
+// Refer to the license.txt file included.
+
+#pragma once
+
+// Intended for containing event functions that are bound to
+// different window controls through wxEvtHandler's Bind()
+// function.
+
+class wxUpdateUIEvent;
+
+namespace WxEventUtils
+{
+void OnEnableIfCoreNotRunning(wxUpdateUIEvent&);
+void OnEnableIfNetplayNotRunning(wxUpdateUIEvent&);
+}  // namespace WxEventUtils