[FLOW3-general] setOrderings for sub-properties

[Sebastian Kurfürst]

Hey Ferdinand,

> The only possibility I can see at the moment is detect "." in the argument, 
> do a join for this table and rewrite the order by statement.
Yeah, that's how I'd do it as well. However, if the table is already
joined, of course nothing needs to be done.

> Has anyone problems with that? Should I try to prepare a patch?
+1, sure :)

Greets, Sebastian