Allow altering enabled for menu items

@emberhood from the original issue should get credit for this change.

So the idea is to use your own logic and set enabled to false if you don't want it to show in the menu?

Yes

OK, this wasn't working for me, until I saw 🐛 Cannot disable Menu Link unless Taxonomy term is unpublished Active . With the MR from this issue and patch #2 from #3505347 this is working as expected for me. Thanks!