charts: respect render_commas option
charts: respect render_commas option

Fix #463

yagebu/fava,yagebu/fava,aumayr/beancount-web,yagebu/fava,aumayr/beancount-web,aumayr/beancount-web,aumayr/beancount-web,beancount/fava,beancount/fava,beancount/fava,yagebu/fava,beancount/fava,beancount/fava,yagebu/fava