Disable counter buttons if entity is unavailable

[spacegaier]

Breaking change

Proposed change

Disable the buttons if entity is not available.

Also reduced some margins for more-info elements. Given that the state display already adds 16px at the bottom before the more-info section starts and the mdc-dialog-content-box also already has 20px padding, there is more then enough negative space already.

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 Counter more-info dialog shows controls when entity is unavailable #8063
• 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