Fix height of card picker

[bramkragten]

Proposed change

Still not perfect as it now keeps the scrollbars while searching, but it stays full-size and doesn't jump...

To do it properly we should set the height on the dialog itself instead of on the containing div, or move the overflow to the div...

Fixes #6231

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:
• 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