I have a number of grids that display columns from a foreign table. There is no longer an option in the online interface to enable sorting. There used to be. For instance I want to be able to sort "Employees" on "Position -> Label".
Grid columns like that I setup before the option disappeared have the sorting functionality enabled when I download my component, so it is still working - there is just no interface when creating my component online.
This only applies to columns of type "Foreign Key", my string, date and number columns all still have the option to sort.