Restore the bottom border to .wp-editor-container so it's not missing when the editor appears outside the main editor container. Fixes #26241, props mattheu.

git-svn-id: https://develop.svn.wordpress.org/trunk@26410 602fd350-edb4-49c9-b593-d223f7449a82
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.

git-svn-id: https://develop.svn.wordpress.org/trunk@26411 602fd350-edb4-49c9-b593-d223f7449a82