Added entity_id to history graph tooltip

[tobias-kuendig]

Proposed change

For this year's Hacktoberfest I wanted to finally deep-dive into my favourite open-source project of this year! This is just a minor addition but something that has irked me for a few weeks now.

This PR adds the entity_id as a beforeBody text to the timeline history graph tooltip.

If there are entities with the same name (like a group + light or a device_tracker + person), this change makes it easy to identify what data you are looking at.

Type of change

• Dependency upgrade
• Bugfix (non-breaking change which fixes an issue)
• New (minor!) feature (thank you!)
• Breaking change (fix/feature causing existing functionality to break)
• Code quality improvements to existing code or addition of tests

Additional information

This PR makes the Chart.js beforeBody property usable in chart tooltips. The property is documented here: https://www.chartjs.org/docs/latest/configuration/tooltip.html

[homeassistant]

Hi @tobias-kuendig,

It seems you haven't yet signed a CLA. Please do so here.

Once you do that we will be able to review and accept this pull request.

Thanks!

[bramkragten]

We should only show the entity_id when in advanced mode

[tobias-kuendig]

Good point, I have update this PR.