[NTG-context] Header and footer style and arranging

Header and footer styles do not work with arranging and double sided layout. Minimal example: \setuppapersize[A5][A4,letter] \setuparranging[2SIDE] \setuppagenumbering[alternative=doublesided] \setupheader[style=smallcaps, color=blue] \setupheadertexts[] \setupheadertexts[Hello][][][World] \starttext \input knuth \stoptext Aditya