Matrix column names remain empty on creator startup #7415
Description
T26353 - Validate JSON schema and highlight questions with errors in Survey Creator
https://surveyjs.answerdesk.io/internal/ticket/details/T26353
When a survey question doesn't contain name, a creator auto-generates this property value when loading an invalid survey.
However, this doesn't happen if a column name is undefined. On creator startup, column names remain empty. It's possible to determine these errors only by running custom validation or activating a JSON Editor:
