Improve genotype coloring.
Improve genotype coloring.

 * Switch back to trait coloring if no integers remain in input box.
 * Improve color consistency. Make branches more gray to distinguish tips.
 * Fix slider to update genotype coloring appropriately.

blab/stability,blab/nextflu,blab/stability,fw1121/nextflu,blab/stability,blab/nextflu,blab/stability,blab/nextflu,blab/nextflu,fw1121/nextflu,blab/stability,doerlbh/Indie-nextflu,doerlbh/Indie-nextflu,doerlbh/Indie-nextflu,fw1121/nextflu,doerlbh/Indie-nextflu,fw1121/nextflu,blab/nextflu,blab/stability