editor: Ensure code actions menu doesn't grow beyond its max size (#35211)

This resolves the same issue as fixed by
https://github.com/zed-industries/zed/pull/34939/commits/d295409f0fc9c1ccd5e06e91c1c5365e96f16486
for the code actions menu.

No release notes since this only occurs on Nightly.

Release Notes:

- N/A

crates/editor/src/code_context_menus.rs

@@ -844,7 +844,7 @@ impl CompletionsMenu {
         .with_sizing_behavior(ListSizingBehavior::Infer)
         .w(rems(34.));
 
-        Popover::new().child(div().child(list)).into_any_element()
+        Popover::new().child(list).into_any_element()
     }
 
     fn render_aside(