Gui: [skip ci] handle number of decimals in PropertyUnitItem, PropertyVectorDistanceItem and PropertyPlacementItem
Gui: [skip ci] handle number of decimals in PropertyUnitItem, PropertyVectorDistanceItem and PropertyPlacementItem

Fat-Zer/FreeCAD_sf_master,Fat-Zer/FreeCAD_sf_master,Fat-Zer/FreeCAD_sf_master,Fat-Zer/FreeCAD_sf_master,Fat-Zer/FreeCAD_sf_master