Consistent Addition
1. Additions are hidden by onChanged()
2. makeStairs() previously made 1st segment of a Complex Stairs went to Base and the rest segments went to Additions
3. For consistency in grouping and visibility, all segments in go to Additions with this commit
Consistent Move With Host
1. A Complex Stairs has multiple segment (in Additions) and railings (in RailingLeft/Right), they should move togther.
2. All segments and Railing set MoveWithHost to True upon creation, and thus move together, regardless system setting default with this commit
Other Associated Inconsistency
Other visibility default behaviour as discussed in https://forum.freecad.org/viewtopic.php?p=844965#p844920 would be added in subsequent PR
Last associated PR/commits :
b10fa7fb34