added action bar for selected bookmark item

lib/pages/collections_list_page.dart

@@ -87,7 +87,8 @@ class _CollectionsListPageState extends State<CollectionsListPage> {
     final collections = Storage.loadCollections();
     bookmarkCountMap = Storage.loadPerCollectionBookmarkCount();
     addingNewBookmark =
-        context.watch<SharedLinkProvider>().currentMapsLinkMetadata != null;
+        Provider.of<SharedLinkProvider>(context).currentMapsLinkMetadata !=
+        null;
     return Scaffold(
       appBar: AppBar(
         title: addingNewBookmark
@@ -96,8 +97,10 @@ class _CollectionsListPageState extends State<CollectionsListPage> {
         actions: [
           if (addingNewBookmark)
             TextButton(
-              onPressed: () =>
-                  context.read<SharedLinkProvider>().removeCurrentMapsLink(),
+              onPressed: () => Provider.of<SharedLinkProvider>(
+                context,
+                listen: false,
+              ).removeCurrentMapsLink(),
               child: Text(AppLocalizations.of(context)!.cancel),
             )
           else