sunburst: also add dummy nodes for internal nodes
sunburst: also add dummy nodes for internal nodes

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