Keep the CCTV panel through Context isolation, and collapse through the panel chrome

Contacts and Space Missions switch CCTV off to isolate themselves and restore
it on the way out: the panel and its share preference now stay as they are for
that round trip, as they do for Clear selected data layers. The controls no
longer read the collapsed class before asking: the panel chrome tells a panel
the accordion folded from one whose saved state is closed.

The camera controls gate asserts the collapse, reopens CCTV from the right
rail before switching it back on, and runs a Contacts entry and exit with the
panel open.

docs/CURRENT-STATE.md

@@ -2230,9 +2230,13 @@ settles), so a new camera's preview is blank only while its frame loads. Disposa
 releases listeners, subscriptions, image handlers, summary timers and chip-hide timers.
 
 The panel opens when a camera becomes active and collapses when the layer is
-switched off, from its own switch or anywhere else; a context-mode layer clear
-keeps it as it is. A panel opened by hand while the layer is off stays open,
-and its meta line reads the catalog count, not the last active camera.
+switched off, from its own switch or anywhere else. The panel chrome applies
+the collapse, so a panel the desktop accordion only folded has its saved and
+shared state closed too. Clear selected data layers and Context isolation
+(Contacts, Space Missions) switch the layer off without the user asking: the
+panel and its share preference stay as they are, and the layer comes back to an
+open panel. A panel opened by hand while the layer is off stays open, and its
+meta line reads the catalog count, not the last active camera.
 
 ## UI disposal