[Users] Scary composer feature: disappearing address fields

[Ralf Mardorf]

X-Mailer: Claws Mail 3.13.2-1-geb08800 (GTK+ 2.24.29; x86_64-arch-linux-gnu)
vs
X-Mailer: Claws Mail 3.13.2            (GTK+ 2.24.26; x86_64-unknown-linux-gnu)

As already pointed out I'm using openbox 3.6.1, not a DE with theme.

So it's either the version of GTK, but I doubt this, since I didn't
noticed it before, or the WM, DE, theme.

Somebody already mentioned the DE, resp. theme.