Decode the sample permalink shown to the user. This avoids showing encoded non-Latin characters in the sample permalink.

Fixes #16496
Props linuxologos


git-svn-id: https://develop.svn.wordpress.org/trunk@30364 602fd350-edb4-49c9-b593-d223f7449a82
Remove a stray translator comment for a non-translatable string added in [30209] See #27238


git-svn-id: https://develop.svn.wordpress.org/trunk@30365 602fd350-edb4-49c9-b593-d223f7449a82