Primitives · a raise keeps its state under its owner's id

A raise inside another was namespaced by its place in the layer's
queue, so one that came before it moved its id path and rebuilt its
keyed state and focus: an open date popup would lose its month when a
tip appeared. raise now takes its owner's id and draws under it, and
float and float_height pass the owner's id on from every call site.
A test holds a focused box in a raise while another comes before it.

src/documents/link.rs

@@ -198,7 +198,9 @@ impl RenderOnce for LinkEditor {
                         }),
                 ),
             );
-        div().id(self.id).child(float(anchor, 1, panel, window, cx))
+        div()
+            .id(self.id.clone())
+            .child(float(self.id, anchor, 1, panel, window, cx))
     }
 }