Models can be added within models

[gidonkatten]

Can add other models within model editor.

The current model editor is filtered out on the front end to avoid that recursive case although there is no general cycle checking implemented.

Also re-added input connections for model nodes. This impacts the overview editor so @KacperKazan there may be some slight changes needed.

[tomproberts]

A lot of great stuff! Just my comment about the message, and one other issue: If you rename a Model, the name of the corresponding node will update in the Overview editor, but not in any Model editor which contains that Modek. E.g. there are 2 models: Model1, and Model2. Model2 contains Model1. The name of Model1 changes to newModelName, but if you look in Model2 it still says Model1 not newModelName...

[gidonkatten]

A lot of great stuff! Just my comment about the message, and one other issue: If you rename a Model, the name of the corresponding node will update in the Overview editor, but not in any Model editor which contains that Modek. E.g. there are 2 models: Model1, and Model2. Model2 contains Model1. The name of Model1 changes to newModelName, but if you look in Model2 it still says Model1 not newModelName...

Also deleting editors has same problem

[tomproberts]

All looks good to me, idk if anybody else wants to take a look but I'm happy to approve.

[tomproberts]

All seems good to me, tho a bit hacky obviously but I don't know what the long term plans are for model nodes and stuff.