Users must be able to copy shared content made by others

[tmkarlsen]

All content within Explore, should display a "Copy" button for content made by others.

Exceptions:

• Users own shared content should display "Edit" button
• Content CC-ND licenses (BY-ND and BY-NC-ND) that do not allow for editing of copies should allow for copying, not editing (in My content")

Discussion: non-editable content should display information about the limitations in Explore or detail view