Fix regression bug on broken page up/down keys.
Fix regression bug on broken page up/down keys.

digitaluzu/nimble-bookmarks,evanshultz/neater-bookmarks,ahmadassaf/Neater-bookmarks,jrpeasee/neater-bookmarks,jrpeasee/neater-bookmarks,cheeaun/neat-bookmarks,ohalo/neat-bookmarks,treykc78/neater-bookmarks,ahmadassaf/Neater-bookmarks,digitaluzu/nimble-bookmarks,treykc78/neater-bookmarks,evanshultz/neater-bookmarks,ohalo/neat-bookmarks