Title override is applied even when disabled

When you disable the setting in the views_ui module to allow overriding the title of the pane, the title is still applied.

Steps to reproduce on clean Drupal 7 installation:

1. Enable views_ui, views_content, page_manager, panels
2. Create a new view with a "Content Pane" display
3. Set the content pane's title to 'QWERTY'
4. Enable the 'Title override' setting in 'Allow settings' and click Save
5. Go to the Page manager, enable the node page and create a new variant of "Panels" type
6. Use the content pane from above as the content for the variant and enable a title override, eg '555'
7. Set 'Title pane' to 'From pane' and check the 'Panel title' setting in the content pane's context menu
8. Visit a node page. The title displays correctly as '555'
9. Now edit the view above and disable the 'Title override' option in ''Allow settings' and click Save
10. Visit a node page. The title displays still as '555' instead of 'QWERTY'

I tried the same with the 'Use pager', 'Items per page', 'Pager offset' and 'More link' settings and they work correctly.