Add undo/redo functionality to dashboard editor

[jpbede]

Proposed change

Add undo/redo functionality to dashboard editor. I'll leave this here for discussion wether we want this and if this is the right approach.

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

[piitaya]

We already have toast with undo when deleting something

We should remove that logic because it will be confusing to have multiple undo/redo logic. Or it should properly call the undo action.

[bramkragten]

We probably need to store the location for every action in the stack, and navigate to that location when you undo/redo something. So you see something is changed when it happens on a different page than the one you are now on.

This is because dashboards can have multiple views.