added abilty to edit and delete collections

lib/pages/collection_page.dart

@@ -21,6 +21,14 @@ class CollectionPage extends StatefulWidget {
 class _CollectionPageState extends State<CollectionPage> {
   MapsLinkMetadata? selectedMapsLink;
 
+  @override
+  void initState() {
+    super.initState();
+    WidgetsBinding.instance.addPostFrameCallback((_) {
+      if (selectedMapsLink != null) onAddButtonPressed();
+    });
+  }
+
   void onAddButtonPressed() => showDialog(
     context: context,
     builder: (context) => CreateBookmarkDialog(
@@ -43,21 +51,13 @@ class _CollectionPageState extends State<CollectionPage> {
     ),
   );
 
-  @override
-  void initState() {
-    super.initState();
-    WidgetsBinding.instance.addPostFrameCallback((_) {
-      if (selectedMapsLink != null) onAddButtonPressed();
-    });
-  }
-
   void onBookmarkSaved(Bookmark bookmark) {
     Storage.addOrUpdateBookmark(bookmark);
     setState(() {});
     context.read<SharedLinkProvider>().removeCurrentMapsLink();
   }
 
-  Widget bookmarkListBuilder(BuildContext context, Bookmark bookmark) {
+  Widget bookmarksListItemBuilder(BuildContext context, Bookmark bookmark) {
     return ListTile(
       title: Text(bookmark.name),
       onTap: () => launchUrlFromString(bookmark.link),
@@ -95,7 +95,7 @@ class _CollectionPageState extends State<CollectionPage> {
       ),
       body: ListView.builder(
         itemBuilder: (context, index) =>
-            bookmarkListBuilder(context, bookmarks.elementAt(index)),
+            bookmarksListItemBuilder(context, bookmarks.elementAt(index)),
         itemCount: bookmarks.length,
       ),
       floatingActionButton: FloatingActionButton(