Fixes https://github.com/FreeCAD/FreeCAD-translations/issues/82 The dropdown `TechDraw > Extensions: centerlines and threading` (submenu) is too long and superfluous. Renamed to: `Extensions: Centerlines/Threading`. Also exposed to translation.
Fixes https://github.com/FreeCAD/FreeCAD-translations/issues/82 The dropdown `TechDraw > Extensions: centerlines and threading` (submenu) is too long and superfluous. Renamed to: `Extensions: Centerlines/Threading`. Also exposed to translation.