This is a followup to rBf79b4850fb3c as discussed in D9046.
When creating new Materials or Worlds through the buttons in
"template_ID", as well as making single users through that template,
actions were always copied. Now respect the User Preference under
Editing > Duplicate Data, and only copy actions if this option is
chosen.
Note: Object > Relations > Make Single User is unaffected by this change
(this is a different beast where 'Materials' _will_ copy actions,
whereas 'Data' wont... maybe we should also take the User Preference
into account here?)