Not a bug, but not a feature request either. Minor enhancement and a usability issue.

Right-click the panel and select Add applet.

The subsequent dialog box is squished. Peculiar looking.

Same behavior in 3.5.10. Thus, Trinity likely inherited the same behavior.

The old benchmark was being usable in 640x480, but I think 800x600 is acceptable nowadays. Regardless, the dialog box could be a bit longer to provide better readability.

Darrell