feat(globe): answer the clear and share actions through the globe actions store

The top-center bar is now GlobeActions.vue. The shell publishes whether a
clear is under way and answers the clear and share buttons through the
globe actions store, instead of binding listeners and writing attributes on
the buttons. A shell disposed mid-clear resets the busy state, so the next
shell's bar is not left busy. bindClearLayersControl stays exported and is
deprecated.

CHANGELOG.md

@@ -72,9 +72,11 @@
   are the kit's new `UiChip`. The selects are the kit's new `UiSelect`, the
   status badges its new `UiBadge` and the one-line empty states its new
   `UiEmpty`.
-  `syncScopeControls`
-  (`./ui/display`) and `shouldHideCollapsedRightPanels` (`./ui/layout`) are
-  deprecated: the Display view and the rail now own what they did. `./ui/input` imports Vue
+  The top-center clear and share buttons call the shell through the new
+  globe actions store. `syncScopeControls` (`./ui/display`),
+  `shouldHideCollapsedRightPanels` (`./ui/layout`) and
+  `bindClearLayersControl` (`./ui/layers`) are deprecated: the Display view,
+  the rail and the globe actions view now own what they did. `./ui/input` imports Vue
   (samehkhamis).
 
 - `./ui/cctv` and `./ui/radio` import Vue and Pinia: their controllers