Show disabled entities for a config_entry by default + number of hidden entities

[spacegaier]

Breaking change

Proposed change

Covers both points of the requested feature, to always select the disabled entities automatically be default if the entities for a given config_entry are to be shown. Plus show the number of hidden entities (disabled, unavailable, read-only) including a button to show them all, which stets all three checkboxes in the filter menu.

• This new information is not shown in a new box, if an active filter for an integration / config_entry is in effect.
• If a filter is in effect, the number of hidden entities is included in it (and only counts the entities that match the filter)
• The visual appearance matches the filter box (in fact currently uses the same CSS classes).

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 Make disabled entities more obvious and easier to enable #7299
• 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