Add Core to supervisor/system

[ludeeus]

Breaking change

Proposed change

Add a Core card to supervisor/system.
With both core and supervisor using calver, the confusion continues, hopefully, this will make things clearer.
Action buttons have also been prefixed, like "Supervisor restart"

The metrics card is removed and the metrics are inserted at the bottom of their respective cards.

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:
  • https://community.home-assistant.io/t/2021-1-happy-new-year/264975/38
  • https://community.home-assistant.io/t/2021-1-happy-new-year/264975/39
  • https://community.home-assistant.io/t/2021-1-happy-new-year/264975/63
  • https://community.home-assistant.io/t/2021-1-happy-new-year/264975/65
  • https://community.home-assistant.io/t/2021-1-happy-new-year/264975/71
  • https://community.home-assistant.io/t/2021-1-happy-new-year/264975/72
  • https://community.home-assistant.io/t/2021-1-happy-new-year/264975/76
  • I can probably find other examples in other threads, but you get the point.
• Link to documentation pull request:

Checklist

• The code change is tested and works locally.
• There is no commented out code in this PR.
• [:joy:] 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

[bramkragten]

Shouldnt core be the first card?

[ludeeus]

It's the Supervisor panel, IMO all other "sections" are secondary information

[frenck]

I agree with Bram. It feels more logical to have Core -> Supervisor -> Host (or Host -> Supervisor -> Core) in order of the way they are stacked.

(BTW, freaking nice addition, will help to resolve versioning understanding issues).

[ludeeus]

Core - SU - host

Host - SU - Core

[frenck]

For me, personally, either works. The last one (host first) feels more focused on the Supervisor panel maybe, so that might be better.

[bramkragten]

Personally, I would still prefer core first, but I can also live with this.

I'm afraid people will reboot the host more now.

[frenck]

@bramkragten Haha that is actually a valid concern 😓

[ludeeus]

reordered, and added confirmation dialogs to core/su restart

[bramkragten]

One last nitpicks, can we change the wording on the buttons?

Core Restart -> Restart Core
Host Reboot -> Reboot Host

etc