- 'Renderer' now receives 'WindowResizedEvent' and handle the
'Framebuffer' and viewport stuff
- Added 'Renderer' now uses the new 'FlushScene' function to flush when
the mapped vertex buffer is filled
- The viewport is now set by 'RenderCommand' via the 'Renderer' rather
than the 'GraphicsConntext'
- 'Window' no longer sends 'WindowResizedEvent' to 'GraphicsContext'
- 'GraphicsContext' no longer receives 'OnWindowResize' events
- Note: Sending events should be done by the 'Application'
