use more fitting floating action button, cleanup

frontend/lib/pages/current_trip.dart

@@ -0,0 +1,84 @@
+import 'package:anyway/modules/current_trip_save_button.dart';
+import 'package:flutter/material.dart';
+import 'package:sliding_up_panel/sliding_up_panel.dart';
+
+import 'package:anyway/structs/trip.dart';
+import 'package:anyway/modules/current_trip_landmarks_list.dart';
+import 'package:anyway/modules/current_trip_greeter.dart';
+import 'package:anyway/modules/current_trip_map.dart';
+
+
+
+class TripPage extends StatefulWidget {
+  final Trip trip;
+
+  TripPage({
+    required this.trip,
+  });
+
+  @override
+  State<TripPage> createState() => _TripPageState();
+}
+
+
+
+class _TripPageState extends State<TripPage> {
+
+  @override
+  Widget build(BuildContext context) {
+    return SlidingUpPanel(
+        panelBuilder: (sc) => _panelFull(sc),
+        // collapsed: _floatingCollapsed(),
+        body: MapWidget(trip: widget.trip),
+        // renderPanelSheet: false,
+        // backdropEnabled: true,
+        maxHeight: MediaQuery.of(context).size.height * 0.8,
+        padding: EdgeInsets.only(left: 10, right: 10, top: 25, bottom: 10),
+        // panelSnapping: false,
+        borderRadius: BorderRadius.only(topLeft: Radius.circular(25), topRight: Radius.circular(25)),
+        boxShadow: [
+          BoxShadow(
+            blurRadius: 20.0,
+            color: Colors.black,
+          )
+        ],
+    );
+  }
+
+  
+  Widget _panelFull(ScrollController sc) {
+    return ListenableBuilder(
+      listenable: widget.trip,
+      builder: (context, child) {
+        if (widget.trip.uuid != 'pending' && widget.trip.uuid != 'error') {
+          return ListView(
+            controller: sc,
+            padding: EdgeInsets.only(bottom: 35),
+            children: [
+              Greeter(trip: widget.trip),
+              ...landmarksList(widget.trip),
+              Padding(padding: EdgeInsets.only(top: 10)),
+              Center(child: saveButton(widget.trip)),
+            ],
+          );
+        } else if(widget.trip.uuid == 'pending') {
+          return Greeter(trip: widget.trip);
+        } else {
+          return Column(
+            children: [
+              const Icon(
+                Icons.error_outline,
+                color: Colors.red,
+                size: 60,
+              ),
+              Padding(
+                padding: const EdgeInsets.only(top: 16),
+                child: Text('Error: ${widget.trip.errorDescription}'),
+              ),
+            ],
+          );
+        }
+      }
+    );
+  }
+}