Always set parent for the Dialog, if we want to see the Dialog in the same display as a parent.
Dialog will be shown in the primary monitor otherwise.
+ fixed a draw of the canvas legend when we move application between Retina and non-Retina displays
with the following refactorings:
1) Removed the "printhost_slug" config from the Printer config
and from all the Printer config related spots.
2) "printhost_slug" renamed to "printhost_port". Slug sounds nasty.
3) Improved error reporting of RepetierHost class.
4) Refactored for the new "Physical Printers"
Following refactorings were done independently of the Repetier pull request:
1) Removed PrintHost static print config.
2) Clean-up after conversion of print host configuration
from Printer config to Physical Printer config.
3) Fixed some issues, where the Printer config was still queried for
host configuration. Vojtech believes that this should not happen
after the host configuration is converted to physical printers.
Vojtech still feels that more refactoring is needed in regard to porting
the host configuration from Printer profile to the new Physical Printer
profile.
