SDL keyboard input: should go to top level widget only
SDL keyboard input: should go to top level widget only

Avoid the typed input to be added to all
InputText present on the stack: only the
top one should handle it.

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