Better alignment of Visual and Text tabs with editor, better alignment of word count container with editor, eliminate gap between tabs and editor on Press This. Fixes #26238, props mattheu.
Built from https://develop.svn.wordpress.org/trunk@26411


git-svn-id: http://core.svn.wordpress.org/trunk@26311 1a063a9b-81f0-0310-95a4-ce76da25c4cd