With #27295, the cursor would center upon running
`SelectLargerSyntaxNode`. This was done to provide more context when
making large selections, but when making small selections (such as a
single parameter in an argument list) it was confusing that the scroll
position jumped.

This change makes that behavior slightly more conservative: now when the
selection is small enough to fit on the screen scrolling will only occur
to keep the cursor position on the screen (including respecting
`vertical_scroll_margin`).

Release Notes:

- N/A

Co-authored-by: João Marcos <marcospb19@hotmail.com>