Fix variable import page

Author: GilbertCherrie

app/controllers/ops_controller/settings/upload.rb

@@ -60,7 +60,7 @@ def upload_form_field_changed
     @sb[:good] = nil
     render :update do |page|
       page << javascript_prologue
-      page.replace_html("settings_import", :partial => "settings_import_tab")
+      page.replace_html("import_variables", :partial => "settings_import_tab")
     end
   end