Just for changelog

Changelog compared to original PSU Control should be as follows:

• printer connection after turn on will be tried until it works or a timeout occurs
  • no manual delay setting necessary
  • it will look a little funny in the ui as it will basically spam connect command every second
  • non blocking implementation (no system hang)
  • files should be printed in any succesful case (if that option was set)
  • will react (connect) if externally turned on (eg. manual control of relay) if enabled in options
• It will start printing every time a file with print command comes in from the slicer
  • this wasn't the case if printer was on but unconnected in og PSU Control

Not sure if the implementation is flawless, but I am using it and it appears to work as intended.