Increased max undo queue size from 7 to 20 actions.
Increased max undo queue size from 7 to 20 actions.

NikolaySuslov/LivelyKernel,LivelyKernel/LivelyKernel,NikolaySuslov/LivelyKernel,LivelyKernel/LivelyKernel,NikolaySuslov/LivelyKernel,LivelyKernel/LivelyKernel