We already have the possibility to create skewed prisms. I recently stumbled upon that I would need this feature for cylinders too.
This PR takes the existing prism extrude direction feature and use it for cylinders too
the UI and the property is not consistent. In the dialog we use the term angle upon user feedback while the property still has the name "skew" in it.
I simply forgot this change in my PR that implemented skew prisms.
This is now corrected by this PR.
With the recently introduced AttachExtension the PartDesign primitives can be attachable by themself and don't need anymore the helping coordinate system datum. This simplyfies the code and the TreeView largely
