Layouts (#189)

* Layout WIP

* Widgets/BoxLayout: Fix layout algorithm

* Widgets/BoxLayout: Fix box layout algorithm for good

* SDK/Widgets: Remove padding

* Sdk/Widgets: Make use of minimum/preferred size

* Sdk/TextAreaWidget: Add Minimum/PreferredSize to TextArea

* Sdk/Widgets: Add height/width variants of get/set fixed, maximum, minimum and preferred size methods

* Sdk/BoxLayout: Remove useless code

* Sdk/TextAreaWidget: Fix compilation

* Widgets/TextAreaWidget: Fix cursor position

SDK/include/NDK/Widgets/ButtonWidget.inl

@@ -93,6 +93,10 @@ namespace Ndk
 	{
 		m_textSprite->Update(drawer);
 
+		Nz::Vector2f textSize = Nz::Vector2f(m_textSprite->GetBoundingVolume().obb.localBox.GetLengths());
+		SetMinimumSize(textSize);
+		SetPreferredSize(textSize + Nz::Vector2f(20.f, 10.f));
+
 		Layout();
 	}
 }