[NTG-context] Dotted line in ToC

I’ve in my Table of Contents a dotted line in entries for section. But the dots don’t end in a virtual vertical line before the pagenumbers (because of the common width of »head and pagenumber«?). 1. What can I do for a clear right border of dots? 2. What is the way to define the distance between the dots (dotsep)? \definelist [section] \setuplist [section] [alternative=c] \definecombinedlist [content] [chapter,section] [level=section] \starttext \placecontent \chapter{Chapter} \section{Section} \dorecurse{4}{\input knuth} \section{Section} \setuppagenumber [number=20,state=start] \stoptext Thanks in advance!