Helen Hou-Sandi d651f599bf List tables: Even more robust fallback for the primary column.
Since `WP_List_Table::get_default_primary_column()` can be overridden in a subclass and columns can be further filtered, it is possible to end up with a primary column that no longer exists. This is particularly evident in list tables for custom post types that have been altered via filter.

props ocean90.
fixes #32996.


git-svn-id: https://develop.svn.wordpress.org/trunk@33266 602fd350-edb4-49c9-b593-d223f7449a82
2015-07-14 16:17:06 +00:00
2015-03-13 18:11:33 +00:00
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