Locale preferences: Set a default for filesystem/application translation.

Change-Id: I5a7219a3380a8a2f72fe43b84ea0e85cc5454033
Reviewed-on: https://review.haiku-os.org/c/haiku/+/2813
Reviewed-by: waddlesplash <[email protected]>

src/preferences/locale/LocaleWindow.cpp

@@ -664,4 +664,6 @@ LocaleWindow::_Defaults()
 				fDefaultConventionsItem));
 		fConventionsListView->ScrollToSelection();
 	}
+
+	fFilesystemTranslationCheckbox->SetValue(true);
 }