Window groups and Calypso Browser

> Hi Denis,
>
> when I open a Pharo window (like Playground) and select "Create window group" I can
> drag and drop other windows onto it. So one can group several windows into one, each
> one shown with an own tab.
>
> This works for most of the Pharo windows (Playground, Iceberg, ...) in latest Pharo 7 - but
> not for the Calypso browser.
>
> I can drag a system browser into the window group - but when I drag it out again it is just a gray
> window and the content is not usable anymore.
>
> I guess this is a bug in Calypso - so I opened https://github.com/pharo-ide/Calypso/issues/287
>