It's possible all children request 100% of space, need to scale down in
that case. This means that children other than the first one is now
readable in the layout result.

Change-Id: I86a05cd77510bbb6686a53e33f13a60034c8e8f6
Reviewed-on: https://gerrit.libreoffice.org/63037Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>
Tested-by: Jenkins