Avoid overwriting mouse wheel scroll with selection auto-scroll (#4207)

Release Notes:

- Fixed an issue where mouse wheel events could be ignored while
selecting text near the top or bottom of the editor with the mouse.

crates/editor/src/element.rs

@@ -531,8 +531,7 @@ impl EditorElement {
             SelectPhase::Update {
                 position: point_for_position.previous_valid,
                 goal_column: point_for_position.exact_unclipped.column(),
-                scroll_position: (position_map.snapshot.scroll_position() + scroll_delta)
-                    .clamp(&gpui::Point::default(), &position_map.scroll_max),
+                scroll_delta,
             },
             cx,
         );