WP-4562: Remove panopoly items.
WP-4562: Fix typo that hides our view for the listing page.
WP-4562: Add body class when modal window is opened.
WP-4562: Remove the extraneous cancel button.
WP-4562: Remove some more panopoly specific items.
WP-4612: Fix variable.
WP-4611: Rearrange fields on content pane edit form. Fix problem with class not removed on body when overlay is closed on save.
WP-4614: Rename sections to section. Adjust reusable fields.