FIX: closes popover when downloading calendar (#16598)

plugins/discourse-local-dates/assets/javascripts/initializers/discourse-local-dates.js

@@ -246,6 +246,13 @@ export default {
           endsAt: dataset.endsAt,
         },
       ]);
+
+      // TODO: remove this when rewriting preview as a component
+      const parentPopover = event.target.closest("[data-tippy-root]");
+      if (parentPopover?._tippy) {
+        parentPopover._tippy.hide();
+      }
+
       return;
     }