[NTG-context] sort order in registers (indexes)

Ahoi, usually, uppercase index entries are sorted before all lowercase entries. Is there a simple setup to change that? i.e. I need the sorting sum - Sun - sunny instead of Sun - sum - sunny I know I can influence sort order for single entries, but I’d like a general setting. (Diacritics are handled as wanted.) \starttext \strut \index{Sun}\index{sun}\index{Suomi}\index{suave} \index{sunny}\index{sum}\index{Sumatra}\index{summon} \index{sample}\index{super} \index{şample}\index{südlich}\index{súper} \index{şun}\index{sün}\index{şüñ} \completeindex \stoptext Greetlings, Hraban --- https://www.fiee.net http://wiki.contextgarden.net https://www.dreiviertelhaus.de GPG Key ID 1C9B22FD