Made settings work with sort order

todolist/core/src/main/java/todolist/core/TodoSettings.java

...java/todolist/json/internal/TodoSettingsDeserializer.java

...n/java/todolist/json/internal/TodoSettingsSerializer.java

...list/core/src/test/java/todolist/json/TodoModuleTest.java

todolist/fxui/pom.xml

...st/fxui/src/main/java/todolist/ui/TodoListController.java

...t/fxui/src/main/java/todolist/ui/TodoModelController.java

todolist/fxui/src/main/resources/todolist/ui/TodoModel.fxml

...xui/src/test/java/todolist/ui/TodoListControllerTest.java

...st/fxui/src/test/resources/todolist/ui/TodoList_test.fxml

...t/fxui/src/test/resources/todolist/ui/TodoModel_test.fxml