Compute the icon based on the logbook state and not the current state

[bdraco]

Proposed change

• If there was no custom icon, we used the current state to
  calculate the icon. We need to use the state from the log

I thought this was a regression caused by #12713 but I
went back to Monday's build and it was the same.

Before

After

Type of change

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

Example configuration

Additional information

• This PR fixes or closes issue: fixes #
• This PR is related to issue or discussion:
• Link to documentation pull request:

Checklist

• The code change is tested and works locally.
• There is no commented out code in this PR.
• Tests have been added to verify that the new code works.

If user exposed functionality or configuration variables are added/changed:

• Documentation added/updated for www.home-assistant.io

[bdraco]

At some point fetching the icon started returning svg data ??

[bdraco]

So in #10223 we now return an SVG but overrideIcon expects something else

[bdraco]

Still need to fix custom icons

[bramkragten]

Why do we care if it is loaded?

[bdraco]

#12713 (comment)

[bdraco]

Need to fix custom images

Actually thats correct, the logbook api doesn't provide the historic image and it provided an icon instead in this case so it should show the icon because the current image would be incorrect.