Class that migrates a given theme.json structure to the latest schema.

Function that migrates a given theme.json structure to the last version.

Removes the custom prefixes for a few properties that were part of v1:

Processes the settings subtree.

Processes a settings array, renaming or moving properties.

Removes a property from within the provided settings by its path.

Description Pending

Prepares the query variables.

Sanitizes the widget form values as they are saved.

Attempts to add custom template information to the template item.