Fix saving entities of the device in scene editor

[dabku]

Breaking change

Proposed change

If you pick an entity (not a device) in the scene editor that does not belong to the device, the device will be added. There is no indication that the rest of the entities from this device won't be saved even if the state was manipulated in the editor. To provide a way to save the state of just picked entity and be able to change the rest of the device, I propose to add an entity to the scene every time a device's entity is clicked (to show more info).

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]

The fix should be adding all entities of the device when the entity is added.

[dabku]

The fix should be adding all entities of the device when the entity is added.

Logic was updated. It will now add a device with all the entities.