Pass $reassign parameter to 'delete_user' and 'deleted_user' actions.

props genkisan.
fixes #23057.
Built from https://develop.svn.wordpress.org/trunk@27462


git-svn-id: http://core.svn.wordpress.org/trunk@27307 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Fix docblock formatting in [27462]. see #23057.
Built from https://develop.svn.wordpress.org/trunk@27463


git-svn-id: http://core.svn.wordpress.org/trunk@27308 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Limit the drag/drop upload only to newer browsers (IE10+), add a fullscreen dropzone in DFW mode, props kovshenin, see #19845
Built from https://develop.svn.wordpress.org/trunk@27464


git-svn-id: http://core.svn.wordpress.org/trunk@27309 1a063a9b-81f0-0310-95a4-ce76da25c4cd