Moved invalid location message to location

src/preferences.py

@@ -351,20 +351,10 @@ class PreferencesWindow(Adw.PreferencesWindow):
             # Bad picked location, inform user
             else:
                 title = _("Invalid Directory")
-                match location_name:
-                    case "cache":
-                        # The variable is the name of the source
-                        subtitle_format = _("Select the {} cache directory.")
-                    case "config":
-                        # The variable is the name of the source
-                        subtitle_format = _("Select the {} configuration directory.")
-                    case "data":
-                        # The variable is the name of the source
-                        subtitle_format = _("Select the {} data directory.")
                 dialog = create_dialog(
                     self,
                     title,
-                    subtitle_format.format(source.name),
+                    location.invalid_subtitle.format(source.name),
                     "choose_folder",
                     _("Set Location"),
                 )