[Update] Multi-parental hierarchy (v1.86) (Patreon)

I bet not everyone even knew that we had a specific tree-like view to show origin of cultures and religions. It was there for a few years already, but its usage was always limited. The problem is that tree structure allows each node (element) to have only one parent. Overwise it cannot be built correctly.

Today I'm introducing a pretty minor change that allows to add additional parents. These secondary links are rendered independently of tree structure and does not affect it. So the display can quickly get messy once lots of secondary links are added. But still it allows to manage much more complex data now.

By default FMG generates hierarchical data for religions only. Now it is enhanced to generate multi-original religions in some cases. Cultures data is still in users' hands. Creating a decent hierarchy may required adding multiple 'shadow' nodes for extinct elements and we don't have it right now for cultures. But it's pretty simple to add them manually, so the update is supposed to be helpful.