add current bbox in page rendering hash So that changing bbox could take effect on current page.
add current bbox in page rendering hash
So that changing bbox could take effect on current page.

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