Addition of a standing-sitting moment

[bladslaatje]

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The addition of a standing-sitting moment feature is currently under consideration. Many individuals now use standing desks, but the accompanying software is often lacking. Incorporating this feature would be a significant improvement.

To Reproduce
Steps to reproduce the behavior:

1. stettings: extra tab with sit and stand moments
2. timers that you can set by your slef
3. example: 30 minutes of sitting time, 6 minutes of standing, and resetting after standing.
4. option to switch it of if you dont have height-adjustable desk.

Expected behavior
After 30 minutes of work, you'll receive a signal indicating that it's time to stand, followed by another signal after 6 minutes to remind you to sit down