Fix ImportsController param to permit :mode (#13347)

app/controllers/settings/imports_controller.rb

@@ -29,6 +29,6 @@ class Settings::ImportsController < Settings::BaseController
   end
 
   def import_params
-    params.require(:import).permit(:data, :type)
+    params.require(:import).permit(:data, :type, :mode)
   end
 end