feat(positioner_box): add units QLabel to device UI components and update visibility logic
Description
This MR adds units to all positioner visualizations.
Related Issues
closes #495 (closed)
Potential side effects
[Describe any potential side effects or risks of merging this MR.]
Screenshots / GIFs (if applicable)
Additional Comments
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Definition of Done
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Documentation is up-to-date.
Edited by wakonig_k