fix #1336 by ignoring uncompatiable saved highlights
fix #1336 by ignoring uncompatiable saved highlights

mihailim/koreader,NickSavage/koreader,NiLuJe/koreader,Frenzie/koreader,poire-z/koreader,pazos/koreader,houqp/koreader,noname007/koreader,poire-z/koreader,mwoz123/koreader,ashhher3/koreader,lgeek/koreader,chihyang/koreader,ashang/koreader,chrox/koreader,Markismus/koreader,apletnev/koreader,robert00s/koreader,koreader/koreader,frankyifei/koreader,Hzj-jie/koreader,Frenzie/koreader,koreader/koreader,NiLuJe/koreader