Hide null values either from header or completely

[TheHolyRoger]

Checklist

• I am running the latest version of the card
• I checked if there isn't another feature request opened with the same request
• I checked that the feature is not already available in the dev branch

Describe the solution you'd like
Would be great if there was an option to hide null or zero values from the header or from the whole chart.

Describe alternatives you've considered
Tried transforming zero to null, just results in N/A in the header

Additional context
Using a large group of sensors of which a lot of them are 0 most of the time, not interested in seeing them unless they are > 0

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This issue is stale because it has been open 30 days with no activity. Remove stale label or comment or this will be closed in 10 days.

[github-actions]

This issue was closed because it has been stalled for 10 days with no activity.

[github-actions]

🎉 This issue has been resolved in version 2.2.0-dev.3 🎉

The release is available on GitHub release

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