Rename "VPS"/"FPS" to "Speed"/"FPES" so it's clear.

Still scaled to 60, but could change to 100 instead?

"FPES" is "frames per emulated second."  Or we could change it instead...
Add a config setting to force 60 fps in games.
Cut down on estimated GPU cycle counts.

They are too high and cause problems for games.
Add UI for forcing FPS at 60.
Change the config setting to not say game.
Just use FPS except in the name.

Hopefully users don't get confused.  I don't think "internal FPS" is gonna
fit for all languages in a way that makes sense.
Merge pull request #2542 from unknownbrackets/fps-limit

Add an optional hack to force <= 60 FPS