Fix for breadcrumbs for pages #6989
Check we're on the correct post type before editing columns

Closes #6991
Fixed meta_query for shortcodes, closes #6960
destroy the global!
Merge pull request #6990 from boohoogal/page_breadcrumbs_fix

Fix for breadcrumbs for pages #6989
Merge pull request #6992 from bryceadams/patch-6991

Check we're on the correct post type before editing columns
Make 'public', and rewrite, optional for attributes

#6852
Add attributes with ajax and don't load all attributes at once.

Significantly improves performance with many attributes in admin.
Closes #6852 cc @claudiosmweb
Fixed variable fields on frontend, closes #6868