The Undo button!!!!!!!

UNDO/REDO Bug Fix (The undo button is unreliable it randomly erases multiple past moves at times.THIS IS IMPORTANT FOR WORKFLOW SPEED. Usually after the undo function has wiped out the data the REDO function is greyed out and not usable.

UNLIMITED UNDO - The user should be able to undo every previous move from the last time the session was opened.