909c54033c
Guard the content field against empty strings so adding it in the UI without a value no longer sends content: "" to the API, which is not valid ProseMirror content. This matches the existing defaultApproverIds guard. Also expose title, classification, and document type on the update operation. Like content, these edit the current draft version, creating one from the latest published version when none exists. Signed-off-by: Sacha Al Himdani <sacha@probo.com>