Scroll when pressing PageUp/PageDown
Summary:
Add PageUp/PageDown to the navigationPressed variable.
Remove the m_view->firstVisibleIndex() and m_view->lastVisibleIndex() tests because sometimes it does not work correctly.
BUG: 407118
Test Plan:
Press PageUp/PageDOwn: it scrolls
Press Up/DOwn: it always scrolls
Reviewers: Dolphin, Zren, cfeck, elvisangelaccio
Reviewed By: Dolphin, elvisangelaccio
Subscribers: elvisangelaccio, kfm-devel
Tags: Dolphin
Differential Revision: https://phabricator.kde.org/D21573