Make it possible to see "Modification History"

It would be most helpful for many reasons to be able to quickly see which Admin User made a modification to a shift or reoccurrence. I really hope this can be added. With multiple office staff required to make changes it is often helpful to see who changed something. Both old info and new info would be necessary to see. 

Example:  Shift 2pm-4pm to 1pm -3pm (Who changed this?) Mary in the night shift next Monday and now Scott is in that shift (Who made this change?)

PLEASE Caresmartz!!  Make this a feature!!