Keyboard nav in Single Page view broken
Steps to reproduce:
- Open any score 3 pages or longer (or just long enough to actually get a difference between PgUp resp. Home and PgDn resp. End).
- Switch to Single Page View.
- Press End or PgDn
Expected result: page moves down one screen for PgDn and to the end of the score for End.
Actual result: page moves up slightly.
Do the same as for issue A, except replace step 3 with:
3. Scroll down to the bottom of the score and press PgUp.
Expected result: page moves up one screen.
Actual result: page moves to top of score, identically to Home's behaviour.