Allow admins to add gadgets to Customer Portal

As an admin, I would like to be able to add a (JIRA Dashboard?) gadget to the Service Desk customer portal.

Use case:
We have an add-on for JIRA that allows you to see JIRA issues in a map gadget, as well as create issues from the map. The point is to be able to track the location of where work needs to be done.

We think it would be useful to add this gadget to the JSD Customer portal, so that the customer reporting an issue could indicate the geographical location of the issue, and also see other issues in the same map.

There are also other gadgets that could be useful to see on the customer portal, i.e. some of the chart gadgets in Jira.