SumatraPDF version

• Version 3.5.2

Describe the bug
Middle-click drag get stuck on after releasing middle click

To Reproduce
Steps to reproduce the behavior:

1. open a pdf
2. hold middle click, move the cursor to start autoscroll
3. end autoscroll by releasing middle click.
4. autoscroll doesn't actually end.

Expected behavior
should behave like all normal web browsers, ending autoscroll on release of middle button

Additional context
No issues mentioning this bug is found from a prelim search. If it had already been fixed in a pre-release, the issue should stay open until it's in a proper release version.