Since version 0.82 you can edit your Lovelace layout from the UI itself. To do this, all your cards and views will need an unique ID. This card gives you a button to add ID's to your cards and views.
Add the following to resources in ui-lovelace.yaml:
resources:
- url: /local/custom-lovelace/migrate-card/migrate-card.js
type: module
And add a card with type custom:migrate-card
:
- type: custom:migrate-card