Fix incorrect -mox prefixes in CSS.

Merges [26887] to the 3.8 branch.

props morganestes.
fixes #26702.


git-svn-id: https://develop.svn.wordpress.org/branches/3.8@26947 602fd350-edb4-49c9-b593-d223f7449a82
Break long words in Quick Draft content to prevent ugly overflow, as was previously done.

Merges [26928] to the 3.8 branch.

props aubreypwd, SergeyBiryukov.
fixes #26658.


git-svn-id: https://develop.svn.wordpress.org/branches/3.8@26948 602fd350-edb4-49c9-b593-d223f7449a82