Set default 'cre_storage_size_factor' also in coverbrowser (#3733)
Set default 'cre_storage_size_factor' also in coverbrowser (#3733)


Markismus/koreader,houqp/koreader,koreader/koreader,Frenzie/koreader,Hzj-jie/koreader,poire-z/koreader,mihailim/koreader,Frenzie/koreader,koreader/koreader,NiLuJe/koreader,pazos/koreader,poire-z/koreader,mwoz123/koreader,lgeek/koreader,NiLuJe/koreader