style: Replace single quotes with double quotes

lib/ui/pages/intro.dart

@@ -1,5 +1,5 @@
-import 'package:flutter/material.dart';
-import 'package:moxxyv2/ui/widgets/topbar.dart';
+import "package:flutter/material.dart";
+import "package:moxxyv2/ui/widgets/topbar.dart";
 import "package:moxxyv2/ui/constants.dart";
 
 class IntroPage extends StatelessWidget {

lib/ui/pages/login/login.dart

@@ -1,13 +1,13 @@
-import 'package:flutter/material.dart';
-import 'package:moxxyv2/ui/widgets/topbar.dart';
-import 'package:moxxyv2/ui/widgets/textfield.dart';
-import 'package:moxxyv2/ui/constants.dart';
+import "package:moxxyv2/ui/widgets/topbar.dart";
+import "package:moxxyv2/ui/widgets/textfield.dart";
+import "package:moxxyv2/ui/constants.dart";
 import "package:moxxyv2/redux/state.dart";
 import "package:moxxyv2/redux/login/actions.dart";
 import "package:moxxyv2/helpers.dart";
 
-import 'package:flutter_redux/flutter_redux.dart';
-import 'package:redux/redux.dart';
+import "package:flutter/material.dart";
+import "package:flutter_redux/flutter_redux.dart";
+import "package:redux/redux.dart";
 
 class _LoginPageViewModel {
   final void Function() togglePasswordVisibility;

lib/ui/pages/sendfiles.dart

@@ -1,6 +1,6 @@
-import 'package:flutter/material.dart';
-import 'package:moxxyv2/ui/widgets/topbar.dart';
-import 'package:moxxyv2/ui/widgets/sharedimage.dart';
+import "package:flutter/material.dart";
+import "package:moxxyv2/ui/widgets/topbar.dart";
+import "package:moxxyv2/ui/widgets/sharedimage.dart";
 import "package:moxxyv2/ui/constants.dart";
 
 class SendFilesPage extends StatelessWidget {

lib/ui/pages/settings/about.dart

@@ -1,8 +1,9 @@
 import "dart:collection";
-import 'package:flutter/material.dart';
+
 import "package:moxxyv2/ui/constants.dart";
 import "package:moxxyv2/ui/widgets/topbar.dart";
 
+import "package:flutter/material.dart";
 import "package:url_launcher/url_launcher.dart";
 
 // TODO: Include license text?

lib/ui/pages/settings/licenses.dart

@@ -1,5 +1,6 @@
 import "dart:collection";
-import 'package:flutter/material.dart';
+
+import "package:flutter/material.dart";
 import "package:moxxyv2/ui/constants.dart";
 import "package:moxxyv2/ui/widgets/topbar.dart";
 import "package:moxxyv2/data/libraries.dart";

lib/ui/pages/settings/settings.dart

@@ -1,10 +1,10 @@
-import 'package:flutter/material.dart';
 import "package:moxxyv2/ui/constants.dart";
 import "package:moxxyv2/ui/helpers.dart";
 import "package:moxxyv2/ui/widgets/topbar.dart";
 import "package:moxxyv2/redux/state.dart";
 import "package:moxxyv2/redux/account/actions.dart";
 
+import "package:flutter/material.dart";
 import "package:flutter_settings_ui/flutter_settings_ui.dart";
 import "package:flutter_redux/flutter_redux.dart";
 

lib/ui/widgets/sharedimage.dart

@@ -1,12 +1,11 @@
-import 'package:flutter/material.dart';
-import 'package:moxxyv2/ui/constants.dart';
+import "package:moxxyv2/ui/constants.dart";
 
-/*
- * A class for adding a shadow to Containers which even works if the
- * Container is transparent.
- *
- * NOTE: https://stackoverflow.com/a/55833281; Thank you kind stranger
- */
+import "package:flutter/material.dart";
+
+/// A class for adding a shadow to Containers which even works if the
+/// Container is transparent.
+///
+/// NOTE: https://stackoverflow.com/a/55833281; Thank you kind stranger
 class TransparentBoxShadow extends BoxShadow {
   const TransparentBoxShadow({
       required double blurRadius
@@ -22,9 +21,7 @@ class TransparentBoxShadow extends BoxShadow {
   }
 }
 
-/*
- * A widget to show a message that was sent within a chat or is about to be sent
- */
+/// A widget to show a message that was sent within a chat or is about to be sent.
 class SharedMediaContainer extends StatelessWidget {
   Widget? child;
   ImageProvider? image;

lib/ui/widgets/sharedmedia.dart

@@ -1,5 +1,6 @@
-import 'package:flutter/material.dart';
-import 'package:moxxyv2/ui/widgets/sharedimage.dart';
+import "package:moxxyv2/ui/widgets/sharedimage.dart";
+
+import "package:flutter/material.dart";
 
 class SharedMediaDisplay extends StatelessWidget {
   final List<String> sharedMediaPaths;

lib/ui/widgets/snackbar.dart

@@ -1,5 +1,6 @@
-import 'package:flutter/material.dart';
-import 'package:moxxyv2/ui/constants.dart';
+import "package:moxxyv2/ui/constants.dart";
+
+import "package:flutter/material.dart";
 
 class PermanentSnackBar extends StatefulWidget {
   final String text;

lib/ui/widgets/topbar.dart

@@ -1,11 +1,10 @@
 import "dart:collection";
-import 'package:flutter/material.dart';
 
 import "package:moxxyv2/ui/widgets/avatar.dart";
 
-/*
-Provides a Signal-like topbar without borders or anything else
-*/
+import "package:flutter/material.dart";
+
+/// Provides a Signal-like topbar without borders or anything else
 class BorderlessTopbar extends StatelessWidget implements PreferredSizeWidget {
   List<Widget> children;
 
@@ -15,10 +14,8 @@ class BorderlessTopbar extends StatelessWidget implements PreferredSizeWidget {
     BackButton()
   ];
   
-  /*
-   * A simple borderless topbar that displays just the back button (if wanted) and a
-   * Text() title
-   */
+  /// A simple borderless topbar that displays just the back button (if wanted) and a
+  /// Text() title.
   BorderlessTopbar.simple({ required String title , List<Widget>? extra, bool showBackButton = true }) : children = [
     Visibility(
       child: BackButton(),
@@ -33,9 +30,7 @@ class BorderlessTopbar extends StatelessWidget implements PreferredSizeWidget {
     ...(extra ?? [])
   ];
 
-  /*
-   * Displays a clickable avatar and title and a back button, if wanted
-   */
+  /// Displays a clickable avatar and title and a back button, if wanted
   // TODO: Reuse BorderlessTopbar.simple
   BorderlessTopbar.avatarAndName({ required AvatarWrapper avatar, required String title, void Function()? onTapFunction, List<Widget>? extra, bool showBackButton = true }) : children = [
     Visibility(