[fix] Allow closing SortWidget (#6464)
[fix] Allow closing SortWidget (#6464)

For now, close on any keypress.

Cf. https://github.com/koreader/koreader/issues/6463
pazos/koreader,koreader/koreader,Frenzie/koreader,koreader/koreader,Frenzie/koreader,poire-z/koreader,NiLuJe/koreader,Hzj-jie/koreader,poire-z/koreader,Markismus/koreader,NiLuJe/koreader,mwoz123/koreader