Improve printer management

[Sebastian-Roth]

• Handle WSD (probably best to tell the user to use proper IP connection)
• Inform user that printer driver has to be installed manually (possibly check within fog-client and print warning)

https://forums.fogproject.org/topic/14063/printer-is-apparently-added-but-does-not-show-up-as-a-printer-on-the-windows-10-machine