I would like to have the ability to bulk edit post tags in WordPress. I found an article here which uses a very old version of WordPress (the article published in 2011) and it appears that back then you could bulk edit tags. However, I have just installed a clean install of WordPress 3.9.1 to ensure no plugins were interfering with Bulk Edit, and when I choose multiple posts with the same or different tags, nothing shows up in the Tags textarea! Is this a bug? I've searched around for plugins which may enable this feature but I have not found anything that works.
Screenshots: Quick Edit - works fine. Bulk Edit - nothing here.
Screenshot from version of WordPress from 2011 (from above URL): Shows that tags used to appear in the Bulk Edit screen.