ReaderFooter: Make the wonky "hide me if I'm off" behavior consistent and user-configurable. (#6754)
ReaderFooter: Make the wonky "hide me if I'm off" behavior consistent and user-configurable. (#6754)

* ReaderFooter:
	* Make the wonky "hide me if I'm off" behavior consistent and user-configurable.
mwoz123/koreader,pazos/koreader,poire-z/koreader,Frenzie/koreader,Markismus/koreader,poire-z/koreader,Frenzie/koreader,koreader/koreader,koreader/koreader,Hzj-jie/koreader,NiLuJe/koreader,NiLuJe/koreader