MJoin Model does not support nested types.

[VictorioBerra]

https://github.com/DataTables/Editor-NET/blob/master/DataTables-Editor-Server/MJoin.cs#L750

VS

https://github.com/DataTables/Editor-NET/blob/master/DataTables-Editor-Server/Editor.cs#L1394

Issue:

https://datatables.net/forums/discussion/78941/editor-net-mjoin-leftjoin-data#latest

This forces us to define the nested fields manually via:

.MJoin(new MJoin("InventoryServerWarranty")
    .Model<InventoryServerWarranty>()
    .Field(new Field("InventoryServerWarrantyProvider.Name"))
    .Field(new Field("InventoryServerWarrantyProvider.Description"))