The current "light bulb" icons don't represent processes that have just finished nor a failed process. The lines should also have greater separation.
I've already made local changes replacing the "light bulb" (information) icons with "gears" (preferences) and think it looks fantastic. I also changed:
add(IzPanelLayout.createParagraphGap());
to
add(IzPanelLayout.createVerticalStrut(5));
Additionally, I changed the failed icon from the light bulb to a red X (stop) icon, but don't know how to fail the installer to test what it looks like.
Improvement
Closed
Trivial
Revise FinishPanel and SimpleFinishPanel Icons and Spacing
Would also like to wrap changes for InstallPanel into this as well; replacing the icon shown above the progress panels as the "gears" rather than the "light bulb".
Also added a vertical strut instead of paragraph gap to provide better spacing.
add(IzPanelLayout.createVerticalStrut(5));
//add(IzPanelLayout.createParagraphGap());