fix full screen refresh command, close #99
fix full screen refresh command, close #99

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