Attempting to set visible columns as a join on ForeignKey fails

[Skelmis]

When attempting to set visible columns to a join column on a ForeignKey column the entire table UI will fail to display data as the admin UI doesn't know how to handle it.

Code:

class Manager(Table):
    name = Text()

class Band(Table):
    manager = ForeignKey(references=Manager)

TableConfig(Band, visible_columns[Band.id, Band.manager.name])

Resulting schema:

{"extra":{"visible_column_names": ["id", "name"]},...}

Therefore the client attempts to look for Band.name, which results in it failing.

I believe this to be because it's simply not a supported feature (ForeignKey joins in table configs), but raising it none the less so I can document it

[Skelmis]

Assuming Manager.name is unique, and the user is happy with the implied associated this can be kinda solved with Manager.get_readable using Manager.name as the representation. Still not ideal for if the user wants more visible columns however