de-DE translation: DIE! Eingabetaste! DIE!

We used the term "EINGABETASTE" sometimes, and sometimes "ENTER" for german translation.

ENTER is the better solution, so structurally stick with that everywhere.
It will avoid the Eingabetaste from coming back by copy-pasting.

It was just used in 5 files on master head anymore, so the spitfire by global replacement is tolerable.