Prevent automation action row issue if event name gets cleared

[spacegaier]

Breaking change

Proposed change

Previously the default handleChangeEvent() was used to react to changes in the "Event" input field. But as soon as it got empty, the property was removed from the action. Since however it is mandatory for the action row to know what type of action editor to show, the property needs to stay. Solved by calling "value-changed" ourself without property removal upon empty value.

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 Automation editor reverts to YAML mode on clearing some text fields #8059
• 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