John Cena Level Up (Reduced Frequency)

I said I'd reduce the frequency of the Adethi's John Cena Level Up addon for some dude on reddit.

Triggers lvl 10, 20, 25, 30, 35, 40, and every level thereafter. Have fun.

Took me a bit longer than expected because I slept (tragic) and then tried to use my fork of a different addon for a more configurable experience, which I was mostly (but unsatisfactorily) successful with. Figured I'd just ship out an mvp and come back to it later.