Translations:Release notes 0.21/84/en


 * Several Arch Profile categories have been added: IS RHS, IS SHS, IS Angle and IS Tee. Pull request #7181 and Pull request #7217
 * Arch Profile objects now support modification of the profile type after creation. Pull request #7217
 * Several edit mode issues have been fixed and the Tree view context menus for Arch objects have been improved. Objects that can be edited now have an option in that menu. The  option was removed for objects without a face or that can only have a single face. Pull request #8122
 * Arch SectionPlane objects now handle non-solid objects the same as solid objects. Pull request #8688