Rework counts figure

[jeffkaufman]

• Drop Predictor column because that's going in the appendix
• Sort by Nucleic Acid and then Selection Round
• Add more colors for readability
• Regenerate based on latest mgs-pipeline

I like the colors, but I could be convinced this is too much.

[dp-rice]

@jeffkaufman I think the colors are useful. Are Round 1 and Round 2 different? To my (red/green colorblind) eye they look the same.

[jeffkaufman]

@dp-rice

this better?

[simonleandergrimm]

@jeffkaufman Sorry, I merged this without thinking!