set hidden class for 'discovered' and 'statement'
set hidden class for 'discovered' and 'statement'

Fix #412

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