Add AJAXY loading icon when "Unpublish" button is clicked on a page.

[aoneil]

(03:38:10 PM) ***elijahlofgren tries to find where "Unpublishing..." text is coming from. Trying to add AJAXy loading icon to "Unpublish" icon. Not finding it with grep. (04:03:29 PM) elijahlofgren: It's strange. Stuff like "Saving..." is there. This must be done differently or something. (04:03:31 PM) MattSS: I think there's still a javascript method which just adds "ing..." to the end of any of those form actions when you're clicked :P (04:03:44 PM) elijahlofgren: Ah, I should look for that method. :) (04:03:51 PM) MattSS: Might be called verbalize or something? Not sure what it's called (04:04:07 PM) elijahlofgren: ok, thanks. I'll do some looking.

Moved from GSOC #67