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.

TASKS.md

@@ -349,3 +349,4 @@ Per-component lines live in `tasks/`. Tags there:
 | T29c | 1 | FAIL | a long chip ran past its tag field at 280px |
 | T29c | 2 | PASS | |
 | T29d | 1 | FAIL | the time dialog's rule for a time ahead of now had no test; its test found that a picker opened in a dialog panicked on a deferred draw inside another |
+| T29d | 2 | FAIL | a raise inside a raise took its place in the queue as its namespace, so one appearing before it rebuilt its state and dropped its focus |