Enforce use_key_in_widget_constructors and file_names lints (#913)

* Start enforcing use_key_in_widget_constructors and file_names lints

* dart format

* analysis fixes

* analysis fixes, pt2

* analysis fixes, part 3

* Revert platform_design (test failure)

* More reverts

* Notate why we aren't enforcing a lint

experimental/web_dashboard/lib/src/widgets/categories_dropdown.dart

@@ -16,7 +16,8 @@ class CategoryDropdown extends StatefulWidget {
   const CategoryDropdown({
     @required this.api,
     @required this.onSelected,
-  });
+    Key key,
+  }) : super(key: key);
 
   @override
   _CategoryDropdownState createState() => _CategoryDropdownState();

experimental/web_dashboard/lib/src/widgets/category_chart.dart

@@ -20,7 +20,8 @@ class CategoryChart extends StatelessWidget {
   const CategoryChart({
     @required this.category,
     @required this.api,
-  });
+    Key key,
+  }) : super(key: key);
 
   @override
   Widget build(BuildContext context) {

experimental/web_dashboard/lib/src/widgets/category_forms.dart

@@ -8,6 +8,8 @@ import 'package:web_dashboard/src/api/api.dart';
 import 'package:web_dashboard/src/app.dart';
 
 class NewCategoryForm extends StatefulWidget {
+  const NewCategoryForm({Key key}) : super(key: key);
+
   @override
   _NewCategoryFormState createState() => _NewCategoryFormState();
 }
@@ -37,7 +39,8 @@ class EditCategoryForm extends StatefulWidget {
   const EditCategoryForm({
     @required this.category,
     @required this.onDone,
-  });
+    Key key,
+  }) : super(key: key);
 
   @override
   _EditCategoryFormState createState() => _EditCategoryFormState();

experimental/web_dashboard/lib/src/widgets/dialogs.dart

@@ -11,10 +11,12 @@ import '../app.dart';
 import 'edit_entry.dart';
 
 class NewCategoryDialog extends StatelessWidget {
+  const NewCategoryDialog({Key key}) : super(key: key);
+
   @override
   Widget build(BuildContext context) {
-    return SimpleDialog(
-      title: const Text('New Category'),
+    return const SimpleDialog(
+      title: Text('New Category'),
       children: <Widget>[
         NewCategoryForm(),
       ],
@@ -27,7 +29,8 @@ class EditCategoryDialog extends StatelessWidget {
 
   const EditCategoryDialog({
     @required this.category,
-  });
+    Key key,
+  }) : super(key: key);
 
   @override
   Widget build(BuildContext context) {
@@ -51,6 +54,8 @@ class EditCategoryDialog extends StatelessWidget {
 }
 
 class NewEntryDialog extends StatefulWidget {
+  const NewEntryDialog({Key key}) : super(key: key);
+
   @override
   _NewEntryDialogState createState() => _NewEntryDialogState();
 }
@@ -58,8 +63,8 @@ class NewEntryDialog extends StatefulWidget {
 class _NewEntryDialogState extends State<NewEntryDialog> {
   @override
   Widget build(BuildContext context) {
-    return SimpleDialog(
-      title: const Text('New Entry'),
+    return const SimpleDialog(
+      title: Text('New Entry'),
       children: [
         NewEntryForm(),
       ],
@@ -74,7 +79,8 @@ class EditEntryDialog extends StatelessWidget {
   const EditEntryDialog({
     this.category,
     this.entry,
-  });
+    Key key,
+  }) : super(key: key);
 
   @override
   Widget build(BuildContext context) {

experimental/web_dashboard/lib/src/widgets/edit_entry.dart

@@ -11,6 +11,8 @@ import '../app.dart';
 import 'categories_dropdown.dart';
 
 class NewEntryForm extends StatefulWidget {
+  const NewEntryForm({Key key}) : super(key: key);
+
   @override
   _NewEntryFormState createState() => _NewEntryFormState();
 }
@@ -58,7 +60,8 @@ class EditEntryForm extends StatefulWidget {
   const EditEntryForm({
     @required this.entry,
     @required this.onDone,
-  });
+    Key key,
+  }) : super(key: key);
 
   @override
   _EditEntryFormState createState() => _EditEntryFormState();

experimental/web_dashboard/lib/src/widgets/third_party/adaptive_scaffold.dart

@@ -43,7 +43,8 @@ class AdaptiveScaffold extends StatefulWidget {
     @required this.destinations,
     this.onNavigationIndexChange,
     this.floatingActionButton,
-  });
+    Key key,
+  }) : super(key: key);
 
   @override
   _AdaptiveScaffoldState createState() => _AdaptiveScaffoldState();