Allow working groups (section) to "emancipate" (as own space)

Working groups are section types that can be used for group-assembly processes, open spaces or other short-term, intensive group processes that are open for all space users.

These sections, however, do not allow for membership (and therefore automatic notification to all working group members), which is a necessary future for a continued follow-up of these working groups.

The module node_convert might allow setting up the needed functionality for transforming sections into spaces.