T12c, T13 review fixes: an emptied lightbox closes through its close path, keys pass over disabled and loading rows, the list cursor follows its row through a re-sort

src/lists/item.rs

@@ -77,6 +77,10 @@ impl ListItem {
         self
     }
 
+    pub(crate) fn is_disabled(&self) -> bool {
+        self.disabled
+    }
+
     /// Makes the row pressable; the press keeps focus where it is.
     pub fn on_click(
         mut self,