Add parsing for Size.

TestGame/TestGame.cs

@@ -22,6 +22,8 @@ public class TestGame : Game
         _uiSystem = new UISystem(Input);
         // _uiSystem.RenderDebugRects = true;
 
+        ResourceManager.EnableFileWatching();
+
         _particleSystem = new ParticleSystem();
 
         AddSystemToUpdate(_uiSystem);
@@ -80,8 +82,9 @@ public class TestGame : Game
         var outlineButton = new Button("Outline button", _defaultFontSet);
         outlineButton.StyleVariant = "Outline";
 
-        _buttonContainer.AddChild(addButton);
-        _buttonContainer.AddChild(removeButton);
+        var linkButton = new Button("Link button", _defaultFontSet);
+        linkButton.StyleVariant = "Link";
+
 
         var c = new HorizontalContainer()
         {
@@ -93,6 +96,7 @@ public class TestGame : Game
         c.AddChild(addButton);
         c.AddChild(removeButton);
         c.AddChild(outlineButton);
+        c.AddChild(linkButton);
 
         var vc = new VerticalContainer(0.0f);
         vc.AddChild(c);