Resolve #3587024 "Reducing multivalue prop limit error"

Closes #3587024

Steps to Reproduce

• Create a code component with a multivalue prop (no limit or higher limit).
• Add content with 4 or more values to a page using that component.
• Confirm that the "+ Add new" button is available.
• Update the component definition to set a maximum of 3 values on that prop and "Add to components"
• Load any page containing the affected component instance.
• Confirm there is no error on the page.
• Confirm that the "+ Add new" button is not available.
• Edit again the component and convert it to unlimited
• Load the page and confirm that the "+ Add new" button is available again.