Support for scale precision - dropped for initial implementation

[teolemon]

Scale precision - Dropped for initial implementation

• Create a scale precision default selection screen
  • 
• Create a scale precision setting (1g, 0,1g, 0,01g)
• Integrate the scale precision setting in the App Settings for later change
• Ensure that the server handles saving input precision (@stephanegigandet)
• Create a scale input screen with a scale precision confirmation each time, prefilled with the default, and with an infotip about the importance of cleaning and drying the packaging before weighting for better accuracy
  • 

Part of

• Implement guided packaging input (wizard-like) #515