Option to reverse, or arbitrarily order regions along y-axis

[theurich]

Is your feature request related to a problem? Please describe.
To interpret the profile for a complex run sequence can be difficult. One approach that is starting to make sense to me is to activate specific regions and build up the individual columns bottom up. However, I have noticed that the y-axis ordering of the regions is in reverse order. Better said, it is in "top down" order, but the columns of course are being built up "bottom up", and so it makes it difficult to display it the way I have in mind.

Describe the solution you'd like
Simplest is to have a revers y-axis button.

Describe alternatives you've considered
The more powerful approach would be to be able to re-shuffle the order of regions in the legend below the graph, and have the order then be reflected in how each column is built up.