Add DASH-style denomination shuffling

[checksum0]

Please add DASH-style denomination shuffling instead of having the user manually control the shuffling amount and shuffled output.

In DASH, if you want to shuffle .2495, it will automatically shuffle 2x .1, 4x .01, 9x .001 and fail gracefully on the last digit that is returned as change.

Maybe add a way to control the number of shuffling round done on an output, thus increasing the privacy of said coin, and communicating this information to the end user?

I think this will greatly improve user experience.

[nopara73]

IMO, there isn't enough liquidity for that, just yet.