feat(cockpit): render the Contact and briefing cards' collapse from the store

Cockpit presence now carries contextCollapsed and signalCollapsed.
setContextCollapsed and setSignalCollapsed update presence and republish
it only when the value changes, instead of writing the dataset and the
toggle attributes. CockpitContext and CockpitBriefing bind data-collapsed
and their toggles' aria-expanded, aria-label, title and icon from
presence. The Cockpit utility QA script waits a frame for Vue to render
before it reads the toggles.

src/ui/cockpitController.js

@@ -156,6 +156,9 @@ export class CockpitViewController {
       entryAvailable: false,
       tr3b: null,
       context: false,
+      // The Contact and briefing cards' collapse, which their toggles show.
+      contextCollapsed: false,
+      signalCollapsed: false,
     };
     this.instruments = createInstrumentState();
     this.routeView = createRouteState();