fix ineffective default options of full screen and scroll mode
fix ineffective default options of full screen and scroll mode

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