MenuItem with FormattedText

[sekocabas]

At the moment, it does not seem possible to have menu items to have formatted text strings. I would like to get the look of Borland's Turbo Vision user interface (https://en.wikipedia.org/wiki/Turbo_Vision) using prompt-toolkit, and the ability to have a FormattedText string describe the MenuItem text would be very helpful.

[jonathanslenders]

That looks very nice! I think it should be possible to implement this. I take it as a feature request.