Add some initial widget functionality (prefs partly working)

PortabilityLayer/PLInvisibleWidget.cpp

@@ -0,0 +1,20 @@
+#include "PLInvisibleWidget.h"
+
+namespace PortabilityLayer
+{
+	InvisibleWidget::InvisibleWidget(const WidgetBasicState &state)
+		: WidgetSpec<InvisibleWidget>(state)
+	{
+	}
+
+	InvisibleWidget::~InvisibleWidget()
+	{
+	}
+
+	bool InvisibleWidget::Init(const WidgetBasicState &state)
+	{
+		(void)state;
+
+		return true;
+	}
+}