DebugNow: Style fixes, export class def to header

Update copyright header, make colors static const, * goes with type
DebugNow: Internationalize text

Translation instructions are "keep it short and all uppercase,
5 characters or less".

Now non-English languages can join the fun:

DEBUG JETZT
DEBUG AHORA
DEBUG ORA
DEBUG が現在

... this might be a bit of a challenge for some languages.
DebugNow: Shrink the text a bit, fixes #8170