Revert "Remove into SelectionEffects from .change_selections"

This reverts commit 28380d714d.

crates/repl/src/session.rs

@@ -8,7 +8,6 @@ use crate::{
 };
 use anyhow::Context as _;
 use collections::{HashMap, HashSet};
-use editor::SelectionEffects;
 use editor::{
     Anchor, AnchorRangeExt as _, Editor, MultiBuffer, ToPoint,
     display_map::{
@@ -478,7 +477,7 @@ impl Session {
         if move_down {
             editor.update(cx, move |editor, cx| {
                 editor.change_selections(
-                    SelectionEffects::scroll(Autoscroll::top_relative(8)),
+                    Some(Autoscroll::top_relative(8)),
                     window,
                     cx,
                     |selections| {