Some Improvements

lib/elems/filehandler.dart

@@ -21,6 +21,13 @@ class FileHandler {
     return js;
   }
 
+  static Future<void> saveNotified(String listName, String todoName, String notifyType, bool value) async {
+    Map content = await fileContent;
+    content[listName][todoName][notifyType] = value;
+
+    await saveFile(content);
+  }
+
   static Future<void> saveFile(js) async {
     File f = await localFile;
     String content = json.encode(js);