Hide the query string from the "Hide blog" button

https://www.your-server/xwiki/bin/save/Blog/Blog%20test?ajax=1&form_token=Awuc7EQRxFBGNVJJ0G8XFg&Blog.BlogPostClass_0_hidden=0&comment=Hidden%20entry is an example that contains data that shouldn't be exposed. The POST method should be used instead.