Add some initial widget functionality (prefs partly working)

PortabilityLayer/DialogManager.h

@@ -4,9 +4,12 @@
 
 struct Dialog;
 struct Window;
+struct TimeTaggedVOSEvent;
 
 namespace PortabilityLayer
 {
+	class Widget;
+
 	class DialogManager
 	{
 	public:
@@ -14,4 +17,16 @@ namespace PortabilityLayer
 
 		static DialogManager *GetInstance();
 	};
+
+	class DialogItem
+	{
+	public:
+		explicit DialogItem(Widget *widget);
+		~DialogItem();
+
+		Widget *GetWidget() const;
+
+	private:
+		Widget *m_widget;
+	};
 }