Hotfix/widgetmako

# Purpose
* Resolves #1339

# Why/How
The disable addon hyperlink was sending a `GET` request when it should have sent a `POST`.
A small amount of jquery now sends out a post request and refreshes the page when its finished.

# Possible Side effects
* Literally none
> Use RavenJS (a JS client for Sentry) to log unexpected errors to our Sentry server.

http://cosdev.readthedocs.org/en/latest/osf/guidelines.html#client-side