I myself found UI very distracting in WordPress at the time of writing a blog post and the full screen mode of an editor does not help much, so I decided to write a chrome extension named Barepress to simply hide the left navigation bar and right panel on demand, and make the editor occupy the entire screen keeping the default toolbar as it is unlike the full screen mode in an editor.
See a demo or Install Barepress
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Its always better to hack around than... 