Describe the bug
Unnecessary scrollable white space (left, top, bottom) in Continuous View.

To Reproduce
Steps to reproduce the behavior:

1. Go to 'Any open score'
2. Click on 'Continuous View'
3. Scroll left, up, down
4. See the wide open tundra of unnecessary white space

Expected behavior
Scrolling on left stops at left edge of staff.
Scrolling on top stops at top of first staff.
Scrolling on bottom stops at bottom of last staff.

Screenshots

Platform information
OS: macOS 12.2, Arch.: x86_64
MuseScore version (64-bit): 4.0.0-2199691027
revision: github-musescore-musescore-41e572f