Onboarding · Flows and highlights: focus that holds as the flow turns, a tip that closes

navigation::Wizard keeps one focus handle for Next and Finish, so a
second press on the step before last finishes; Back that reaches the
first step, and a finished step picked by key, hand focus to Next.
Popover::with_opener hands its content a close that gives focus back:
Got it closes the hotspot's tip before the owner hides it, and the
event details close before Edit and Delete run, so focus never lands
on a panel that left the tree. The wizard's count and the setup
checklist's tally name their selectors after their words, and the bar
takes the count's own value.

src/canvas/panel.rs

@@ -87,6 +87,6 @@ pub(crate) fn color_well(
                 .tooltip("Change the color")
                 .on_click(move |window, cx| toggle(window, cx))
         },
-        move |_, _| ColorPicker::new((id, "picker"), color).on_change(on_pick),
+        move |_, _, _| ColorPicker::new((id, "picker"), color).on_change(on_pick),
     )
 }