Add more slots for string highlighting on the chat bar

[Sheeplets]

I have an incredibly hard time with the multitasking that this game requires between the game and chat windows, and I rely on highlights pretty heavily to help pick up the slack when my eyes and (lacking) attention span fall short. The problem is that I need different, important keywords highlighted depending on what characters I'm playing.

It's a pain to have to manually set them every single round when I want to swap between my roster just so I can keep up with the pace of the round. I'd appreciate if we added more slots.

[Owen]

I wouldn't mind having a few more string highlights added. I find that I rely on them pretty heavily, especially during more chaotic rounds. 

[Dreamix]

https://github.com/Aurorastation/Aurora.3/pull/16120