feat(inputcontainer): support showing inputcontainer without content
feat(inputcontainer): support showing inputcontainer without content

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