routes + some structure improvements

lib/main.dart

@@ -1,5 +1,16 @@
 import 'package:flutter/material.dart';
 
 import 'src/openlp_remote_app.dart';
+import 'src/app_theme.dart';
+import 'src/widgets/settings.dart';
 
-void main() => runApp(OpenLPRemoteApp());
+void main() => runApp(
+      MaterialApp(
+        debugShowCheckedModeBanner: false,
+        theme: appTheme,
+        routes: <String, WidgetBuilder>{
+          '/': (context) => OpenLPRemoteApp(),
+          '/settings': (context) => Settings(),
+        },
+      ),
+    );

lib/src/openlp_remote_app.dart

@@ -1,7 +1,5 @@
 import 'package:flutter/material.dart';
 
-import 'app_theme.dart';
-
 import 'widgets/bottom_navigation_bar.dart';
 import 'widgets/search_floating_button.dart';
 import 'widgets/service_listview.dart';
@@ -24,16 +22,15 @@ class _OpenLPRemoteAppState extends State<OpenLPRemoteApp>
 
   @override
   Widget build(BuildContext context) {
-    return MaterialApp(
-      debugShowCheckedModeBanner: false,
-      theme: appTheme,
-      home: Scaffold(
+    return Scaffold(
       appBar: AppBar(
         title: Text('OpenLP Remote'),
         actions: <Widget>[
           IconButton(
             icon: Icon(Icons.settings),
-              onPressed: () {},
+            onPressed: () {
+              Navigator.of(context).pushNamed('/settings');
+            },
             tooltip: 'Settings',
           ),
         ],
@@ -55,7 +52,6 @@ class _OpenLPRemoteAppState extends State<OpenLPRemoteApp>
       floatingActionButton: SearchFloatingButton(),
       floatingActionButtonLocation: FloatingActionButtonLocation.centerDocked,
       bottomNavigationBar: AppBottomNavigationBar(),
-      ),
     );
   }
 }

lib/src/widgets/settings.dart

@@ -0,0 +1,20 @@
+import 'package:flutter/material.dart';
+
+class Settings extends StatefulWidget {
+  @override
+  State<StatefulWidget> createState() => _SettingState();
+  
+}
+
+class _SettingState extends State<Settings> {
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        title: Text('Settings'),
+      ),
+      body: Container(),
+    );
+  }
+  
+}