Let clicks pass through the object breadcrumbs popup. #9128 (#10038)

The breadcrumbs popup is an absolutely-positioned, informational overlay
at the bottom-left of the object explorer, so it intercepted pointer
events and blocked clicks on the tree items beneath it. Set
pointer-events: none so clicks pass through to the tree.

docs/en_US/release_notes_9_16.rst

@@ -44,6 +44,7 @@ Bug fixes
   | `Issue #6308 <https://github.com/pgadmin-org/pgadmin4/issues/6308>`_ -  Fix the infinite loading spinner after an idle database connection is silently dropped, by detecting stale connections and offering a reconnect dialog.
   | `Issue #7596 <https://github.com/pgadmin-org/pgadmin4/issues/7596>`_ -  Fix the Query Tool turning into a blank white screen when the runtime has a malformed default locale, by guarding the Query History date/time formatting against the resulting RangeError.
   | `Issue #9091 <https://github.com/pgadmin-org/pgadmin4/issues/9091>`_ -  Fix the Query Tool re-prompting for an unsaved password in a loop and rejecting the re-entered password, by caching the entered password on the server manager when the primary connection is already established.
+  | `Issue #9128 <https://github.com/pgadmin-org/pgadmin4/issues/9128>`_ -  Fixed an issue where the object breadcrumbs popup blocked clicks on the object explorer items beneath it.
   | `Issue #9595 <https://github.com/pgadmin-org/pgadmin4/issues/9595>`_ -  Fix missing ALTER ... SET DEFAULT statements for inherited columns in the generated table SQL/EDIT script.
   | `Issue #9677 <https://github.com/pgadmin-org/pgadmin4/issues/9677>`_ -  Fix the Unlogged table toggle in table properties not generating any ALTER TABLE ... SET LOGGED/UNLOGGED statement.
   | `Issue #9762 <https://github.com/pgadmin-org/pgadmin4/issues/9762>`_ -  Fix the "Cannot read properties of undefined (reading 'map')" crash in the desktop runtime when a menu refresh is triggered before the application menus have been received.

web/pgadmin/static/js/components/ObjectBreadcrumbs.jsx

@@ -21,6 +21,9 @@ const StyledBox = styled(Box)(({theme}) => ({
   width: 'auto',
   maxWidth: '99%',
   zIndex: 1004,
+  // The breadcrumbs popup is purely informational; let clicks pass through
+  // to the tree items beneath it. #9128
+  pointerEvents: 'none',
   padding: '0.25rem 0.5rem',
   fontSize: '0.95em',
   color: theme.palette.background.default,