bring consistency to our focus events

[JoviDeCroock]

Fixes #4289

We could leave the lower cased ones in for backwards compatibility, floating this to have a consistent file

[coveralls]

coverage: 99.467%. remained the same
when pulling 06a4bbb on consistency-focus-events
into cfba5ee on main.

[rschristian]

I don't think it's necessary to keep the lower-cased versions around. Should be a quick adjustment and is pretty clearly a mistake