🚀 go-pugleaf

I have the following problem:

When I define a JButton component with the designer tool and go to the
Icon property of the Inspector I get a combo box with no items. If I
define myself an Icon object in the source code of my application and go

back to the Inspector, when I click the combo box of the Icon property n
I get the <none> item as above and the name of my newly created Icon
object but there's no way to select this item and this field always
stays in blank...
I found that the only way for me to add an Icon to a JButton is doing it

by myself, even there the icon does not appear on my design screen, only

when I run my application.

How do I populate the combo box for such Icon property?
Is there a repository or something like this to do it?

Many thanks

JORGE