The uninstaller in the control panel does not have an icon:

The following InnoSetup directive seems to set the uninstall icon:
http://www.jrsoftware.org/ishelp/index.php?topic=setup_uninstalldisplayicon
So adding UninstallDisplayIcon={app}\codelite.exe,0 to the relevant installer scripts will probably fix it.