poster: use custom media control colors if defined (refs #903)
poster: use custom media control colors if defined (refs #903)

This actually isn’t a bug, but it was suggested to keep the poster play button consistent with media control configuration.
clappr/clappr,flavioribeiro/clappr,clappr/clappr,flavioribeiro/clappr,clappr/clappr,flavioribeiro/clappr