Implement Selectable for ListItem and ListHeader

crates/ui2/src/components/list/list_header.rs

@@ -62,8 +62,10 @@ impl ListHeader {
         self.meta = meta;
         self
     }
+}
 
-    pub fn selected(mut self, selected: bool) -> Self {
+impl Selectable for ListHeader {
+    fn selected(mut self, selected: bool) -> Self {
         self.selected = selected;
         self
     }

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

@@ -83,11 +83,6 @@ impl ListItem {
         self
     }
 
-    pub fn selected(mut self, selected: bool) -> Self {
-        self.selected = selected;
-        self
-    }
-
     pub fn left_child(mut self, left_content: impl IntoElement) -> Self {
         self.left_slot = Some(left_content.into_any_element());
         self
@@ -109,6 +104,13 @@ impl ListItem {
     }
 }
 
+impl Selectable for ListItem {
+    fn selected(mut self, selected: bool) -> Self {
+        self.selected = selected;
+        self
+    }
+}
+
 impl ParentElement for ListItem {
     fn children_mut(&mut self) -> &mut SmallVec<[AnyElement; 2]> {
         &mut self.children