[Feature] Order barcharts and frequency tables by index (natural order of values)

[GegznaV]

In some cases, the natural order of categories or discrete values matters more than the order of frequencies. So please, add a possibility to order categories not only by frequency but also by natural/defined order of values (i.e., by index).

In the example below I expect 0, 1, 2, 3, 4, and not:

[ojassm]

Hi @fbdesignpro - I would like to try resolving this feature request if you don't mind. Going through your code currently.