Add screen condition to conditional card.

[piitaya]

Proposed change

New condition type : screen.

This will be used in the energy dashboard to hide the date card on desktop so we don't have to have dynamic config based on the screen size in energy strategy.
The screen condition has only one parameter media_query. The user can define any media query using yaml.
In the UI, 4 screen sizes are displayed (mobile, tablet, desktop, wide). The editor will build the media query according to the user selection.

New editor

• Migration to ha-form
• A toggle icon has been added to switch between ui and yaml editor.
• A delete icon has been added to delete the condition. Before, the user had to click on the clear button in the entity picker which resulted to an error. This bug has been fixed too.
• The state input now uses state translations.
• A "add condition" button to select the condition type.

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

[bramkragten]

We should make the UI editor backwards compatible, if there is an entity param in the condition, we should add condition: state to it so the UI editor will just work.

[piitaya]

I added screen sizes to the UI editor, I improved the editor and improved performance for the case with only one condition.

[bramkragten]

(unrelated, but we should add a border-radius)

[bramkragten]

We do need docs for this :-)