fix: added controllers to fix scroll controller already attached errors (#30)

Author: ItsAdityaKSingh

lib/screens/dashboard/dashboard.dart

@@ -15,10 +15,12 @@ import 'package:ccxgui/utils/constants.dart';
 import 'components/start_stop_button.dart';
 
 class Dashboard extends StatelessWidget {
+  final ScrollController controller = ScrollController();
   @override
   Widget build(BuildContext context) {
     return Material(
       child: ListView(
+        controller: controller,
         children: [
           Row(
             mainAxisSize: MainAxisSize.max,

lib/screens/settings/basic_settings.dart

@@ -12,6 +12,7 @@ import 'components/custom_swtich_listTile.dart';
 import 'components/custom_textfield.dart';
 
 class BasicSettingsScreen extends StatelessWidget {
+  final ScrollController controller = ScrollController();
   @override
   Widget build(BuildContext context) {
     return BlocBuilder<SettingsBloc, SettingsState>(
@@ -50,6 +51,7 @@ class BasicSettingsScreen extends StatelessWidget {
             body: Padding(
               padding: const EdgeInsets.all(8.0),
               child: ListView(
+                controller: controller,
                 children: [
                   CustomTextField(
                     title: 'Output file name (press enter to save)',

lib/screens/settings/hardsubx_settings.dart

@@ -12,6 +12,7 @@ import 'package:ccxgui/screens/settings/components/custom_textfield.dart';
 import 'package:ccxgui/utils/constants.dart';
 
 class HardSubxSettingsScreen extends StatelessWidget {
+  final ScrollController controller = ScrollController();
   @override
   Widget build(BuildContext context) {
     return BlocBuilder<SettingsBloc, SettingsState>(
@@ -56,6 +57,7 @@ class HardSubxSettingsScreen extends StatelessWidget {
             body: Padding(
               padding: const EdgeInsets.all(8.0),
               child: ListView(
+                controller: controller,
                 children: [
                   CustomSwitchListTile(
                     title: 'HardSubx',

lib/screens/settings/input_settings.dart

@@ -11,6 +11,7 @@ import 'components/custom_swtich_listTile.dart';
 import 'components/custom_textfield.dart';
 
 class InputSettingsScreen extends StatelessWidget {
+  final ScrollController controller = ScrollController();
   @override
   Widget build(BuildContext context) {
     return BlocBuilder<SettingsBloc, SettingsState>(
@@ -46,6 +47,7 @@ class InputSettingsScreen extends StatelessWidget {
             body: Padding(
               padding: const EdgeInsets.all(8.0),
               child: ListView(
+                controller: controller,
                 children: [
                   CustomSwitchListTile(
                     title: 'Fix pts jumps',

lib/screens/settings/obscure_settings.dart

@@ -9,6 +9,7 @@ import 'package:ccxgui/screens/settings/components/custom_textfield.dart';
 import 'components/custom_swtich_listTile.dart';
 
 class ObscureSettingsScreen extends StatelessWidget {
+  final ScrollController controller = ScrollController();
   @override
   Widget build(BuildContext context) {
     return BlocBuilder<SettingsBloc, SettingsState>(
@@ -41,6 +42,7 @@ class ObscureSettingsScreen extends StatelessWidget {
             body: Padding(
               padding: const EdgeInsets.all(8.0),
               child: ListView(
+                controller: controller,
                 children: [
                   CustomSwitchListTile(
                     title: 'Panasonic DMR-ES15',

lib/screens/settings/output_settings.dart

@@ -13,6 +13,7 @@ import 'components/custom_swtich_listTile.dart';
 import 'components/custom_textfield.dart';
 
 class OutputSettingsScreen extends StatelessWidget {
+  final ScrollController controller = ScrollController();
   @override
   Widget build(BuildContext context) {
     return BlocBuilder<SettingsBloc, SettingsState>(
@@ -72,6 +73,7 @@ class OutputSettingsScreen extends StatelessWidget {
             body: Padding(
               padding: const EdgeInsets.all(8.0),
               child: ListView(
+                controller: controller,
                 children: [
                   CustomSwitchListTile(
                     title: 'BOM',