Change color of bar for mean value in box plots

[pnrobinson]

In the box plot graphics, the mean value is shown with a Red line, but this lines is hard to see and probably should just be black by default.

https://monarch-initiative.github.io/gpsea/stable/user-guide/analyses/phenotype-scores.html

[ielis]

So, we had this:

and now we'll have this:

Now I cannot see the median line on the LoF box.

@pnrobinson does this look OK to you?

[pnrobinson]

In this case, the median line is at the very top of the boxplot, which is probably rare. For the t test we should never see it. The red bar is also difficult to see. However, I think the viewer will know the problem with the LoF boxplot, and in other cases will appreciate seeing the black line?

[ielis]

Based on my quick internet search, it seems that both black and red are common. Some figures make the median line thicker.

But OK, let's make it black by default, and allow the color to be changed to serve the "rare" cases.