Single post in Fully-Interacted?

I'm greatly enjoying the new clickback button, but I've got an idea for the interaction section: is it possible to have it display if you've interacted with all of a farm's Pokémon? I've tried to click back everyone, but sometimes I receive more clicks than the other person has Pokémon, and these names will always be (among the) first in the "Both" section. Without moving them, is there a way to change the link's background?