Network log window stays always on top

[Fernando Naufel]

# Steps to reproduce

* Open claws-mail.

* While messages are being fetched, open network log window (Tools | Network Log). A new window will appear and get the focus.

* Switch the focus back to the main claws window. Maximize this window.

* At this point, I would expect the network log window to be buried behind the main window, but the network window remains on top.

* Changing the options for the network log window through the window manager (in LXDE, Layer | Normal or Layer | Always on Bottom) does not have any effect.

Before I upgraded to 20.04 last week, I used 18.04, and this did not happen.

Thanks

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: claws-mail 3.17.5-2
ProcVersionSignature: Ubuntu 5.4.0-26.30-generic 5.4.30
Uname: Linux 5.4.0-26-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: LXDE
Date: Thu Apr 23 16:58:40 2020
InstallationDate: Installed on 2020-04-16 (7 days ago)
InstallationMedia: Lubuntu 20.04 LTS "Focal Fossa" - Beta amd64 (20200411)
SourcePackage: claws-mail
UpgradeStatus: No upgrade log present (probably fresh install)