Add Saveable Groups of Entities for Spooner

[HKH191]

bascially, allowing the user to duplicate a series of entities placed though the spooner mode in menyoo, take this jewel cabinet, its from the vangelico jewel store, and for the syncronized scene it needs 4 objects, 2 for glass 1 for the main object and 1 for what is inside the glass, it would be nice if we could favrioute the grouping of objects then, spawn it again with all attachment data intact maybe adding it in as a new submenu in spooner, so that you can save a series of placed entities and spawn them, spawning multiple objects and adding them to the database?

[itsjustcurtis]

I like this, thanks for suggesting. I imagine it will need a bit of an overhaul on how the favourites are used in Menyoo, but thats needed for an unrelated issue anyway. Not a high priority but something I would like to look at for sure.