Non-trivial switching

Hi all! I've found solution how to switch layouts with Ctrl+Shift. To be honest, it was sad to found that old "feature", requiring something more than click three checkboxes in the "Xkb Options" still exists. Why can't I set Ctrl+Shift in the TDE Control Center as a shortcut? (Ctrl+Shift shortcut is interpreted as Ctrl + ISO_Next_Group) Why it is necessary to edit config files? I hope someday this behaviour will be fixed. Best wishes, J. Drahun.