cleaning up test after implementation of tokenize(str:String, ...)
ReplConsoleView multiline input + refactoring

Multiline input field in the ReplConsoleView. The UI elements have also been factored out into a trait. To evaluate code/change history, CTRL must be held as well.

CommandField keyboard events can now be overridden, too.
Adds missing super.dispose call
Cosmetics

Relax needlessly concrete members in Intermediate trait.