Introduce dashboard_glance_items filter which replaces 3.7 right_now_* hooks that were tied to table markup.

fixes #26495.


git-svn-id: https://develop.svn.wordpress.org/trunk@26832 602fd350-edb4-49c9-b593-d223f7449a82
Add line height to #commentstatusdiv p so that its checkboxes get some padding between them at responsive sizes. Fixes #26499, props SergeyBiryukov.



git-svn-id: https://develop.svn.wordpress.org/trunk@26833 602fd350-edb4-49c9-b593-d223f7449a82
Style the Add Comment button as a button. Fixes #26500, props SergeyBiryukov.



git-svn-id: https://develop.svn.wordpress.org/trunk@26834 602fd350-edb4-49c9-b593-d223f7449a82
Increase the height of the Add Photos box in Press This to prevent unnecessary scrolling. Fixes #26506, props SergeyBiryukov.



git-svn-id: https://develop.svn.wordpress.org/trunk@26835 602fd350-edb4-49c9-b593-d223f7449a82