Randomise demo data in layout

[gingerbeardman]

Is your feature request related to a problem? Please describe.
It's useful to see the layout with different data, to check alignment or behaviour with different amounts of numbers, or label/list values.

Describe the solution you'd like

• Randomise data option
• each element would randomise its data in a range that makes sense (day, hour, steps, heart rate)

Describe alternatives you've considered

• n/a

Additional context

• Xiaomi Band 10