add ability for non admins to add new traction, pending approval. Various QoL updates

lib/components/pages/more/admin_page.dart

@@ -1,4 +1,5 @@
 import 'package:flutter/material.dart';
+import 'package:go_router/go_router.dart';
 import 'package:provider/provider.dart';
 import 'package:mileograph_flutter/objects/objects.dart';
 import 'package:mileograph_flutter/services/api_service.dart';
@@ -354,6 +355,18 @@ class _AdminPageState extends State<AdminPage> {
     return Scaffold(
       appBar: AppBar(
         title: const Text('Admin'),
+        leading: IconButton(
+          icon: const Icon(Icons.arrow_back),
+          onPressed: () {
+            final navigator = Navigator.of(context);
+            if (navigator.canPop()) {
+              navigator.maybePop();
+            } else {
+              context.go('/more');
+            }
+          },
+          tooltip: 'Back',
+        ),
       ),
       body: ListView(
         padding: const EdgeInsets.all(16),