Shared upload delete warning and shared upload icon

I'm wondering if we can place a dialog box pop up when one is deleting a shared upload telling that the upload is shared and if we are sure to delete it (or maybe place a warning in any case for the upload deletion), also if we can give the possibility to delete the shared upload only to the main author.

A minor thing is also that the shared red icon is present in the uploads overview but not within the upload as you see from the attached images