This happend by the fix for issue 16333, Franck changed the TextField, to
not show highlighted code
and to not use code editor shortcuts/menus:
https://pharo.fogbugz.com/f/cases/16333/no-syntax-highlighting-in-TextModel-beForCode#BugEvent.136901

"... I also put newText for the two bottom boxes in debugger since now newCode is fixed for highlighting, we do not want to have highlighted text for these text areas..."