FlattenedNotesFolder: Make title non optional

Also translate the title string.

assets/langs/en.yaml

@@ -159,6 +159,8 @@ actions:
   newJournal: New Journal Entry
   newChecklist: New Checklist
 screens:
+  home:
+    allNotes: All Notes
   folders:
     title: Folders
     selected: Folder Selected

lib/core/flattened_notes_folder.dart

@@ -1,3 +1,5 @@
+import 'package:meta/meta.dart';
+
 import 'package:gitjournal/core/note.dart';
 import 'package:gitjournal/core/notes_folder.dart';
 import 'package:gitjournal/core/notes_folder_notifier.dart';
@@ -12,7 +14,8 @@ class FlattenedNotesFolder with NotesFolderNotifier implements NotesFolder {
   var _notes = <Note>[];
   var _folders = <NotesFolder>[];
 
-  FlattenedNotesFolder(this._parentFolder, {this.filter, this.title = ""}) {
+  FlattenedNotesFolder(this._parentFolder,
+      {@required this.title, this.filter}) {
     _addFolder(_parentFolder);
   }
 
@@ -130,10 +133,10 @@ class FlattenedNotesFolder with NotesFolderNotifier implements NotesFolder {
   }
 
   @override
-  String get name => title.isEmpty ? "All Notes" : title;
+  String get name => title;
 
   @override
-  String get publicName => title.isEmpty ? "All Notes" : title;
+  String get publicName => title;
 
   @override
   NotesFolderConfig get config {

lib/screens/home_screen.dart

@@ -1,5 +1,6 @@
 import 'package:flutter/material.dart';
 
+import 'package:easy_localization/easy_localization.dart';
 import 'package:intl/date_symbol_data_local.dart';
 import 'package:provider/provider.dart';
 
@@ -29,7 +30,10 @@ class _HomeScreenState extends State<HomeScreen> {
 
     final rootFolder = Provider.of<NotesFolderFS>(context);
     setState(() {
-      notesFolder = FlattenedNotesFolder(rootFolder);
+      notesFolder = FlattenedNotesFolder(
+        rootFolder,
+        title: tr('screens.home.allNotes'),
+      );
     });
   }
 

test/flattened_notes_folder_large_test.dart

@@ -33,7 +33,7 @@ void main() {
     });
 
     test('Should load all the notes flattened', () async {
-      var f = FlattenedNotesFolder(rootFolder);
+      var f = FlattenedNotesFolder(rootFolder, title: "");
       expect(f.notes.length, 300);
 
       var tempDir = await Directory.systemTemp.createTemp('_test_');

test/flattened_notes_folder_test.dart

@@ -85,10 +85,10 @@ void main() {
     });
 
     test('Should load the notes flattened', () async {
-      var f = FlattenedNotesFolder(rootFolder);
+      var f = FlattenedNotesFolder(rootFolder, title: "foo");
       expect(f.hasNotes, true);
       expect(f.isEmpty, false);
-      expect(f.name, "All Notes");
+      expect(f.name, "foo");
       expect(f.subFolders.length, 0);
       expect(f.notes.length, 9);
 
@@ -107,7 +107,7 @@ void main() {
     });
 
     test('Should add a note properly', () async {
-      var f = FlattenedNotesFolder(rootFolder);
+      var f = FlattenedNotesFolder(rootFolder, title: "");
 
       var p1 = (f.fsFolder as NotesFolderFS).getFolderWithSpec("sub1/p1");
       var note = Note(p1, p.join(p1.folderPath, "new.md"));