Make month selections exclusive
Make month selections exclusive

Now selecting a month deselects other selected months — only one month can be selected at a time. Still need to work out some interactions with the full-year facet terms. That’ll be next. Redmine #4653

T2DREAM/t2dream-portal,ENCODE-DCC/encoded,T2DREAM/t2dream-portal,ENCODE-DCC/encoded,T2DREAM/t2dream-portal,T2DREAM/t2dream-portal,ENCODE-DCC/encoded,ENCODE-DCC/encoded