How to create an Ask Ubuntu search button in gnome-shell?

On the overview in gnome-shell, there are two search buttons for Google and Wikipedia. Is it possible to create a similar button for Ask Ubuntu?

I have found fossfreedom's answer to create a DuckDuckGo search button in gnome-shell to be useful and I have used it as a base to answer this question.

To create a new search provider, copy the google.xml file as a template.

11.10

sudo cp /usr/share/gnome-shell/search_providers/google.xml /usr/share/gnome-shell/search_providers/askubuntu.xml

12.04

sudo cp /usr/share/gnome-shell/open-search-providers/google.xml /usr/share/gnome-shell/open-search-providers/askubuntu.xml

Change the following XML tags in the askubuntu.xml file:

<ShortName>Ask Ubuntu</ShortName>
<Description>Ask Ubuntu Search</Description>
<Url type="text/html" method="GET" template="https://askubuntu.com/?q={searchTerms}"/>

If you have done everything right, you should be seeing the Ask Ubuntu search button in the overview.