Various little fixes (#118)

* Add missing override qualifier

* Mostly shadowing, virtual destructor and other little things

SDK/include/NDK/BaseWidget.inl

@@ -10,8 +10,8 @@ namespace Ndk
 {
 	inline BaseWidget::BaseWidget() :
 	m_canvasIndex(InvalidCanvasIndex),
-	m_backgroundColor(Nz::Color(230, 230, 230, 255)),
 	m_canvas(nullptr),
+	m_backgroundColor(Nz::Color(230, 230, 230, 255)),
 	m_cursor(Nz::SystemCursor_Default),
 	m_contentSize(50.f, 50.f),
 	m_widgetParent(nullptr),

SDK/include/NDK/Components/CameraComponent.inl

@@ -39,6 +39,7 @@ namespace Ndk
 	inline CameraComponent::CameraComponent(const CameraComponent& camera) :
 	Component(camera),
 	AbstractViewer(camera),
+	HandledObject(camera),
 	m_visibilityHash(camera.m_visibilityHash),
 	m_projectionType(camera.m_projectionType),
 	m_targetRegion(camera.m_targetRegion),

SDK/include/NDK/Widgets/ButtonWidget.hpp

@@ -27,7 +27,7 @@ namespace Ndk
 
 			//virtual ButtonWidget* Clone() const = 0;
 
-			void ResizeToContent();
+			void ResizeToContent() override;
 
 			inline void UpdateText(const Nz::AbstractTextDrawer& drawer);