Commit 9fdea82542 ("Fix various issues with
`SpawnMultiCursor{Up,Down}`") changed SpawnMultiCursorUp/Down actions to
honor softwrap, i.e. spawn cursor in the next visual line within a
wrapped line, which may not be the next logical line in a buffer. That
was done for "consistency" with cursor movement actions CursorUp/Down
etc. But it seems there are no actual use cases for that, whereas at
least some users prefer spawning multicursor in the next logical line
regardless of the softwrap setting. So restore the old behavior.
Fixes#3499
e6ed161ca4