reworked page layout inheritence

frontend/lib/pages/new_trip_location.dart

@@ -1,5 +1,5 @@
+import 'package:anyway/layouts/scaffold.dart';
 import 'package:anyway/modules/new_trip_options_button.dart';
-import 'package:anyway/pages/base_page.dart';
 import 'package:flutter/material.dart';
 
 import "package:anyway/structs/trip.dart";
@@ -14,7 +14,7 @@ class NewTripPage extends StatefulWidget {
   _NewTripPageState createState() => _NewTripPageState();
 }
 
-class _NewTripPageState extends State<NewTripPage> {
+class _NewTripPageState extends State<NewTripPage> with ScaffoldLayout {
   final TextEditingController latController = TextEditingController();
   final TextEditingController lonController = TextEditingController();
   Trip trip = Trip();
@@ -23,8 +23,9 @@ class _NewTripPageState extends State<NewTripPage> {
   @override
   Widget build(BuildContext context) {
     // floating search bar and map as a background
-    return BasePage(
-      mainScreen: Scaffold(
+    return mainScaffold(
+      context,
+      child: Scaffold(
         body: Stack(
           children: [
             NewTripMap(trip),