The Mode menu does not say Advanced, Karaoke and Performance are experimental #810

What happens

The Mode menu lists Practice, Advanced, Karaoke and Performance with no sign that three of them are new in 0.21.0 and still being tested. A person picking one expects it to be as settled as Practice.

Who it affects

Anyone opening the Mode menu in 0.21.0, in any language.

What should happen

Advanced, Karaoke and Performance carry an "Experimental" tag beside their name. Practice does not. The tag is translated in every language.

Constraints

• The tag must not change the mode's name element, which the existing menu tests read.
• The word needs a key in all ten language tables.