What is the most important part of a car? I guess an engine. And what is the most important part of text editor or IDE?
For many years Monkey Studio had been using QScintilla. Enki, derived from MkS, also used to use QScintilla in the first release. And we never have been happy with it. In fact, we have been hating it, but, there are no alternatives for Qt.
Now this problem is resolved for Enki. I created own code editor component - Qutepart