private void menuItemNew_Click(object sender, System.EventArgs e)
{
// We need to reset the scene.
Scene scene = new Scene();
scene.Initialise(openGLCtrlScene.Width, openGLCtrlScene.Height, SceneType.HighQuality);
openGLCtrlScene.Scene = scene;
// Reset the current selection and scenetree.
PopulateSceneTree();
propertyGridCurrent.SelectedObject = null;
}
