Context Navigation

Changes between Version 1 and Version 2 of Ticket #29147, comment 6

v1	v2
4	4	* The in-post media modals (library and edit image) still use the slightly heavier X. I am open to going with the thinner one, but without the context of the other arrows and the "button" look in other modals, it seemed to stand better.
5	5	* I did make some changes to the above so that the box shadow focus style doesn't look horribly misplaced. However, whether in this release or the next, we should probably re-evaluate and have initial focus go to an input field if at all possible, only falling back to the close button if we have to.
6		* Some of these icons don't have focus styling beyond the ~~color change~~ on hover - this is less than ideal, but given keyboard navigation (escape, arrow keys), I am less concerned about it for this release.
	6	* Some of these icons don't have focus styling beyond the same color change as on hover - this is less than ideal, but given keyboard navigation (escape, arrow keys), I am less concerned about it for this release.