some finetuning of help tour
Merge branch 'feature/printerdriver' of https://github.com/Doodle3D/doodle3d-client into feature/printerdriver

# By Wouter R (2) and peteruithoven (1)
# Via Wouter R (2) and peteruithoven (1)
* 'feature/printerdriver' of https://github.com/Doodle3D/doodle3d-client:
  Warning text improvement
  Fix spelling error.
  Disable settings button if printer is busy or no control access.