Add normalizedData option

[benmccann]

Closes #6765

[kurkle]

I think splitting to linear and series time scales would remove the need for this option (for the series version), wouldn't it? I'm missing something probably, it should be done with the distribution option already if it is so.

[benmccann]

Why do you say splitting the scale would remove the need for the option? I think it'd still be necessary, but might be missing something

I think this option is only necessary for series mode, which seems to be the opposite of what you're suggesting? In series mode we need to know which index a give x value is at. The indexes need to be unique, sorted, and consistent in order to do so

[kurkle]

Oh, right. I meant for linear its not needed and for series we could require data to be normalized. I can't think of a use case with non-normalized data that one would want to plot in series

[benmccann]

Closing in favor of #6775