Improvements to hover and focus states on the adminbar:

* Add a clear hover state for top-level links in the adminbar.
* Add :focus styles to the adminbar for keyboard accessibility.
* Ensure that the username link in the profile submenu gets a :hover style.
* Add adminbar hover styles to color schemes.
* Set -webkit-font-smoothing to subpixel-antialiased on the adminbar so that Safari doesn't switch to standard antialiasing on mouseover.

Fixes #26152, props ryelle.


Built from https://develop.svn.wordpress.org/trunk@26407


git-svn-id: http://core.svn.wordpress.org/trunk@26307 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Keep the resize handle from jumping around when switching between the Visual and Text editors. Fixes #26246, props mattheu.


Built from https://develop.svn.wordpress.org/trunk@26408


git-svn-id: http://core.svn.wordpress.org/trunk@26308 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Twenty Fourteen: fix image alignment in editor styles, props azaozz and RDall. Fixes #26108.
Built from https://develop.svn.wordpress.org/trunk@26409


git-svn-id: http://core.svn.wordpress.org/trunk@26309 1a063a9b-81f0-0310-95a4-ce76da25c4cd
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.
Built from https://develop.svn.wordpress.org/trunk@26410


git-svn-id: http://core.svn.wordpress.org/trunk@26310 1a063a9b-81f0-0310-95a4-ce76da25c4cd
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
Adjust the mceResize handle so it matches the handle on the plain text editor. See #26241.
Built from https://develop.svn.wordpress.org/trunk@26412


git-svn-id: http://core.svn.wordpress.org/trunk@26312 1a063a9b-81f0-0310-95a4-ce76da25c4cd