To insert hyperlinks, there is only the option of adding the URL. Perhaps a URL parameter?
The description widget only has the ability to open in a new window, and I think this is the most common workflow. Otherwise, you would lose your dashboard view and just have the hyperlink open and then if you needed to go back, it would have to reload the dashboard.
Can you describe the need you have for it to open on the same window (and thus close the dashboard view)?
Here is the HTML for this:
<a href = "www.google.coml" target = "_self"> </a>
which you can use html tags in the description tag you need to open the html button on the top panel.
Retrieving data ...