Table Editor: schema information and settings

[DitlevHB]

I have two points here:

1. As it is right now, you cannot set the default schema that will be shown in the Table Editor. It will always be public.
   It would be great if you could select which schema is shown as default when opening the Table Editor.

2. Right now, you can only see the table definition and it would make a lot of sense if you could also inspect the schema definition.