ISTWCMS-5432 Fix vimeo video banner broken when the uploaded image is deleted...

Lily Yanrequested to merge
feature/ISTWCMS-5432-l26yan-Banner-images-block-broken-when-referenced-content-is-removed into 1.0.x

ISTWCMS-5432 Fix vimeo video banner broken when the uploaded image is deleted in media and file tabs

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