- same as https://github.com/FreeCAD/FreeCAD/commit/a5dcf87d0 but for Helices (fixes #7629 also for helices) - also modernize Qt connection
- same as https://github.com/FreeCAD/FreeCAD/commit/a5dcf87d0 but for Helices (fixes #7629 also for helices) - also modernize Qt connection