Use a more consistent markup on taxonomy and user screens.

props paulwilde.
fixes #29842.
Built from https://develop.svn.wordpress.org/trunk@29820


git-svn-id: http://core.svn.wordpress.org/trunk@29586 1a063a9b-81f0-0310-95a4-ce76da25c4cd
* Use correct context for 'Name' and 'Parent' strings on taxonomy screens.
* Remove unnecessary context for 'Slug' and 'Description' strings.

props andg.
fixes #29824.
Built from https://develop.svn.wordpress.org/trunk@29821


git-svn-id: http://core.svn.wordpress.org/trunk@29587 1a063a9b-81f0-0310-95a4-ce76da25c4cd