Delete the hash in case status is live in blog edit page

When a blog post is published using the publish method in the
controller, we clear the hash, here should do that too.
Update form_validation_lang.php

Typo fix
Merge pull request #2664 from jaoustin/patch-1

Update form_validation_lang.php
Merge branch 'blog' of git://github.com/Youhan/pyrocms into 2.2/develop
Merge branch '2.2/develop' of github.com:pyrocms/pyrocms into 2.2/develop