[util/simple-hint] Capture pageup/pagedown keys
[util/simple-hint] Capture pageup/pagedown keys

femhub/CodeMirror2,filonb/CodeMirror2,leoshine/CodeMirror,leoshine/CodeMirror,femhub/CodeMirror2,filonb/CodeMirror2,filonb/CodeMirror2,femhub/CodeMirror2