Always show channel toggle when collapsed (#3698)

Marshall Bowers created 

This PR makes the channel toggle disclosure always visible when a
channel tree is collapsed, as opposed to just being visible on hover.

This makes it possible to visually identify collapsed channel trees
without having to hover over each entry.

Release Notes:

- N/A

Change summary

crates/ui2/src/components/list/list_item.rs | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

Detailed changes

crates/ui2/src/components/list/list_item.rs 🔗 

@@ -192,7 +192,7 @@ impl RenderOnce for ListItem {
                             .flex()
                             .absolute()
                             .left(rems(-1.))
-                            .visible_on_hover("")
+                            .when(is_open, |this| this.visible_on_hover(""))
                             .child(Disclosure::new(is_open).on_toggle(self.on_toggle))
                     }))
                     .child(