[NTG-context] right to left direction for itemize columns

I have posted a question in tex stack exchangeCustomize right to left list in context http://tex.stackexchange.com/questions/294627/customize-right-to-left-list-i... My aim is to obtain right to left items arranged in multi-column, if I use \startitemize [s,columns,three] [margin=1em] the result is three column where first column start from left side of page, but I want it to start from right side of page. I can use \startcolumns[direction=left]\startitemize \item First \item Second \item Third \stopitemize \stopcolumns but I think it look better if there is a key direction=left for the \startitemize environment such as used in columns environment.