Improve sidebar and dashboard management logic

[piitaya]

Proposed change

Needs home-assistant/core#156955

Built-in dashboards (overview, home, light, security, climate) will be hidden by default in the sidebar except if they are set as default dashboard. User can still many add them to their sidebar manually.
Default panel will also be display at the top is the user didn't reordered the sidebar.

Better sidebar customization:

• Users can now reset their sidebar to default settings with a new "Reset to defaults" button in the sidebar editor menu
• The default panel (home dashboard) is now clearly labeled with "(default)" and can't be accidentally hidden
• The overview panel can be displayed in the sidebar even if it is not set as default

Clearer dashboard management:

• Added "Set as default" action in overflow menu and removed the confusing "Set/remove as default" button from individual dashboard settings.
• Every dashboard panel can now be set as default (system or user level).

Technical improvement

Sidebar logic has been simplified by removing some hardcoded rules. Most panels now have the same behavior in the sidebar (except some special ones like developer-tools, profile, config).

Screenshots

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

[MartinHjelmare]

Core PR is approved.

[bramkragten]

This comment doesnt make sense here anymore