footer: update when toggling markers
footer: update when toggling markers

koreader/koreader,houqp/koreader,pazos/koreader,Frenzie/koreader,koreader/koreader,lgeek/koreader,mwoz123/koreader,Markismus/koreader,Frenzie/koreader,poire-z/koreader,robert00s/koreader,mihailim/koreader,apletnev/koreader,Hzj-jie/koreader,NiLuJe/koreader,NiLuJe/koreader,poire-z/koreader,NickSavage/koreader