Good question. For that specific site, the global stylesheet editor doesn’t expand. Other sites it expands correctly. There is a JS error in the console at page load that may or may not be related.
The light coloured buttons are also a bit inconsistent in dark mode given how elegant and coherent the rest of the Cwicly UI has become, but that is a minor issue.
I can confirm the width issue is no longer occurring for us with the latest Cwicly version but the white buttons still appear the same as in the screenshot in dark mode.