* Fix template and preview overflowing container
* Fix extra whitespace around "documentation" link
* Increase minimal height of the template input field
It was technically still there, just offscreen. The wrapper element
was display: block, and some block layout quirk caused the button to
grow to fill the wrapper, which then put it offscreen when rotated.
This removes the wrapper and replaces it with a margin. Also fixes an
incorrect margin in RTL locales.
