Bug#912768: hplip-data: hp-toolbox fsck

[Till Kamppeter <till.kamppeter@gmail.com>]

In general, it looks like that the HPLIP guys at HP are not testing well 
the GUI part. This caused the following bugs, all forwarded upstream but 
no fixes from upstream yet, only distro patches in the Ubuntu Cosmic 
package of HPLIP (3.18.7+dfsg1-2ubuntu2):

https://launchpad.net/bugs/1688684
  hp-check does not show distro names correctly but internal
  index numbers for them

https://launchpad.net/bugs/1745383
  QMessageBox() is called incorrectly

https://launchpad.net/bugs/1789184
  hp-toolbox does not start at all

The drivers themselves (CUPS filters/PPD files and SANE module) seem to 
work reasonably well, but for some small part of the device range a 
proprietary plugin is needed, and some of these devices probably also 
offer driverless IPP printing and this way one could work around the 
proprietary plugin at least if it concerns only printing.

For diagnostic purposes you can perhaps also use hp-check instead of 
hp-doctor as it has no GUI.

   Till