allow disable highlight by default
allow disable highlight by default

minor code change

typo

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