Add Virtual Sub-Trees Support

[skttl]

Describe the bug
In v13 I added a tree to the commerce section, for showing extended info about specific orders.

I did it like this:

        builder.WithSection(
            "commerce",
            section =>
                section.AddTree(
                    "Extended",
                    "icon-ball",
                    tree =>
                        tree.AddCollection<ExtendedOrderInfo>(

Nothing shows up in the Commerce section.

If I add my own section instead, like this:

        builder.AddSectionBefore(
            "commerce",
            "Commerce Extras",
            section =>
                section.Tree(tree =>
                    tree.AddCollection<ExtendedOrderInfo>(

I can see the tree as expected.

Steps To Reproduce
Steps to reproduce the behavior:

1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error

Expected behavior
I expected the configuration to work like it did in v13

Environment (please complete the following information):
Umbraco 16.0.0, UI Builder 16.0.0

[acoumb]

Hi @skttl ,

Current version of the CMS doesn't support virtual sub trees that were previously used in V13.

I will add this to the backlog and try talking with the CMS team for available options on this.

Regards,
Adrian

[mattbrailsford]

I'm going to convert this to a feature request