Ubuntu 14.04 Trusty Tahr, Gnome. How do I add application icons on the top panel?
This is what I had on Precise:

And this is what I have on Trusty:

I tried icon dragging and the right click, but they only launch the application.
EDIT: note that this question is about Ubuntu 14.04 Trusty Tahr, the thing that worked in previous releases (such as Precise) does not work anymore.