reworked page layout inheritence

frontend/lib/pages/current_trip.dart

@@ -1,5 +1,5 @@
 import 'package:anyway/constants.dart';
-import 'package:anyway/pages/base_page.dart';
+import 'package:anyway/layouts/scaffold.dart';
 import 'package:flutter/material.dart';
 import 'package:sliding_up_panel/sliding_up_panel.dart';
 
@@ -28,12 +28,13 @@ class TripPage extends StatefulWidget {
 
 
 
-class _TripPageState extends State<TripPage> {
+class _TripPageState extends State<TripPage> with ScaffoldLayout{
 
   @override
   Widget build(BuildContext context) {
-    return BasePage(
-      mainScreen: SlidingUpPanel(
+    return mainScaffold(
+      context,
+      child: SlidingUpPanel(
         // use panelBuilder instead of panel so that we can reuse the scrollcontroller for the listview
         panelBuilder: (scrollcontroller) => CurrentTripPanel(controller: scrollcontroller, trip: widget.trip),
         // using collapsed and panelBuilder seems to show both at the same time, so we include the greeter in the panelBuilder
@@ -58,9 +59,13 @@ class _TripPageState extends State<TripPage> {
       title: FutureBuilder(
         future: widget.trip.cityName,
         builder: (context, snapshot) => Text(
-          'Your trip to ${snapshot.hasData ? snapshot.data! : "..."}',
+          'Trip to ${snapshot.hasData ? snapshot.data! : "..."}',
         )
       ),
+      helpTexts: [
+        'Current trip',
+        'You can see and edit your current trip here. Swipe up from the bottom to see a detailed view of the recommendations.'
+      ],
     );
   }
 }