Avoid loading attached Blob when displayed a contentView

When displaying a content view, for Documents that have a Blob we display a download link.

For doing that, we do load the Blob object.
For the default implementation, this is not an issue, but for S3 backed BinaryManager this can create a lot of issue.

We can walkaround this problem on the UI side, but it would be even better, if we could get a lazy implementation so that the problem can not be introduced :

• either specificaly in the S3 Binary Manager
• either more generically in the platform