You can clone with
HTTPS or Subversion.
All file options to upload an image should have a simple remove button.
Also the uploader should be the new wordpress media uploader, that looks much nicer!
@slaFFik what do you think? can this be implemented quickly?
Quickly - no. I think it's better to postpone, until main bugs will be fixed.
@slaFFik yeah okay for 2.0