Minimize in Classical skin not work from new ver 4.x.x

Hi community and devs,

first at all, thank to all for this awesome player and all around it.

From the release of new version I could see that this function not work anymore. I had waiting for a fix, but I can see until now.

For that today I registered to report this problem.

I am in Ubuntu 18.04 64bits. And use the version from ubuntuhandbook.org PPA.

If it is necessary that I will open ticket bug in your system only say me. I wan't disturb you too much.

Thanks in advanced!

David Gámiz Jimenez

Audacious