IEF complex widget: Re-ordering / weight sometimes not updated

Tested #12 with Inline Entity Form 2.0.0-beta3

Tested #12 with Inline Entity Form 2.0.0-beta6

#12 is in
tnx

Automatically closed - issue fixed for 2 weeks with no activity.

Bulk reopen.

Needs an automated test.

This is a duplicate of 🐛 Cannot update the order weight using complex form widget Needs work . Both issues have patches with widely different solutions. We need to figure out which one to implement (if any). Both patches need tests. The less desirable solution's issue needs to be closed after granting credit to all contributors in the other issue.

After evaluating the two available solutions, my preference is to close this one. This patch adds more code to sort the references in the event no entity was changed. But that function already sorts the references toward the end. So this introduces a huge code and functionality duplication problem. What happens if or when sorting functionality needs to be updated or fixed? That's just asking for more bug reports.

Furthermore, the 🐛 Cannot update the order weight using complex form widget Needs work patch removes the code that causes the bug. This patch just works around it. Maybe the other patch isn't a complete solution yet, but I would rather start from that point than just add more code bloat to this module.