OPDS browser: adjust book information font size (#7783)
OPDS browser: adjust book information font size (#7783)

Use the the same font size as the list of books.
NiLuJe/koreader,Frenzie/koreader,koreader/koreader,NiLuJe/koreader,poire-z/koreader,Frenzie/koreader,koreader/koreader,poire-z/koreader