Z index shenanigans (#4089)

Release Notes:

- Fixed a bug allowing certain UI elements to render incorrectly when
overlapping.

crates/editor/src/hover_popover.rs

@@ -339,6 +339,7 @@ fn show_hover(
 
                 this.hover_state.info_popover = hover_popover;
                 cx.notify();
+                cx.refresh();
             })?;
 
             Ok::<_, anyhow::Error>(())