Vocabulary builder: fix translatable string and minor UI issue (#9233)
Vocabulary builder: fix translatable string and minor UI issue (#9233)


Frenzie/koreader,koreader/koreader,koreader/koreader,poire-z/koreader,NiLuJe/koreader,poire-z/koreader,Frenzie/koreader,NiLuJe/koreader