Make sure Qubes-Whonix-Workstation can be used as DispVM.
whonixcheck is already working in a Qubes-Whonix-Workstation DispVM in the Whonix 13 development version. Apparently the Qubes upstream issue [home folder of template not inherited by DispVM](https://github.com/QubesOS/qubes-issues/issues/1335) is the only thing preventing this.
Thanks to the help of @marmarek two issues preventing this were already fixed.
* `no longer write to home folder directly; use /etc/skel`:T419
* `up to date versions of Tor Browsers in newly created AppVMs inherited from updated TemplateVMs`: T417
user documentation stub: