update init files

src/ui/__init__.py

@@ -1,14 +1,12 @@
 import pathlib
 
 from .dialogs import (
-    App_Ext_Dialog,
+    ApparatExtendDialog,
     Mail_Dialog,
     Settings,
     edit_bookdata_ui,
-    fileparser_ui,
     login_ui,
     medienadder_ui,
-    new_subject_ui,
     parsed_titles_ui,
     popus_confirm,
     reminder_ui,
@@ -19,7 +17,6 @@ from .Ui_semesterapparat_ui import Ui_MainWindow as Ui_Semesterapparat
 from .widgets import (
     DataGraph,
     FilePicker,
-    Message_Widget,
     StatusWidget,
     CalendarEntry,
     MessageCalendar,