Context Navigation

Changes between Version 4 and Version 5 of Ticket #17180, comment 11

v4	v5
2	2
3	3	* Check the dates via js whenever the post publishing form `#post` is submitted. If the dates are invalid, prevent publish, hide the ajax spinner, remove the disabled state from the publish button and slide down the `#timestampdiv` revealing the date error (highlited in red), giving the user a visual indication of the problem and an opportunity to fix it.
4		* Check the dates with php's native `chekdate()` function before ~~before~~ saving a post and return a `WP_Error` if the date is wrong
	4	* Check the dates with php's native `chekdate()` function before saving a post and return a `WP_Error` if the date is wrong
5	5
6	6	Tested the patch with posts, pages and quick edit and it all works as expected.