Fixes for issues #1, #2 & #3

Hi guys, I've sent you a pull request with fixes for the three main issues I could find in your portlets.
#1 Error when clicking on information icon
#2 Img tag broken when portlet instance has no defined icon
#3 Portlets Tab > Go to this page action generates a wrong link

If you are happy with that could you please try to release a new version of the portlet?

Cheers.