migrated from FlatButton to TextButton

lib/components/AddDialog.dart

@@ -21,11 +21,11 @@ class AddDialog extends StatelessWidget {
         )
       ]),
       actions: <Widget>[
-        new FlatButton(
+        new TextButton(
           child: const Text('CANCEL'),
           onPressed: () => Navigator.pop(context),
         ),
-        new FlatButton(
+        new TextButton(
           child: const Text('ADD'),
           onPressed: () {
             if (this.onAdd != null && textController.text.isNotEmpty)

lib/components/ErrorDialog.dart

@@ -10,7 +10,7 @@ class ErrorDialog extends StatelessWidget {
     return AlertDialog(
       content: Text(error.toString()),
       actions: <Widget>[
-        FlatButton(
+        TextButton(
           child: Text('Close'),
           onPressed: () => Navigator.of(context).maybePop(),
         )

lib/pages/namespace/namespace.dart

@@ -1,6 +1,5 @@
 import 'dart:async';
 
-import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
 import 'package:after_layout/after_layout.dart';
 

lib/pages/task/edit_task.dart

@@ -24,7 +24,6 @@ class _TaskEditPageState extends State<TaskEditPage> {
   bool _done;
   bool changed = false;
   DateTime _due;
-  TimeOfDay _temp_due_tod;
   TextEditingController titleController = TextEditingController();
   TextEditingController descriptionController = TextEditingController();
 

lib/pages/user/login.dart

@@ -124,7 +124,7 @@ class _LoginPageState extends State<LoginPage> {
                     'Login failed! Please check your server url and credentials. ' +
                         ex.toString()),
                 actions: <Widget>[
-                  FlatButton(
+                  TextButton(
                       onPressed: () => Navigator.pop(context),
                       child: const Text('Close'))
                 ],

lib/pages/user/register.dart

@@ -140,7 +140,7 @@ class _RegisterPageState extends State<RegisterPage> {
                     'Registration failed! Please check your server url and credentials. ' +
                         ex.toString()),
                 actions: <Widget>[
-                  FlatButton(
+                  TextButton(
                       onPressed: () => Navigator.pop(context),
                       child: const Text('Close'))
                 ],