Translations:Release notes 0.21/62/en


 * Arch Profile objects now support modification of the profile type after creation. Pull request #7217
 * The Terrain of an Arch Site can now also be a solid. Pull request #8409
 * An Arch Site no longer shows a phantom representation of the objects in its Group. Pull request #8409
 * Arch SectionPlane objects now handle non-solid objects the same as solid objects. Pull request #8688