Adds button copy.
Adds 2 first cherry-picks
Adds cherry-pcik
Cherry-picks easier implementation
Removing one else if.
Cherry-pick removes redundant code
Cherry-pick minor changes
Some improvements.
Fixes wrong render in the admin interface
Merge pull request #272 from doleiynyk/2013-08-06_Copy_Products_Cherry_Pick

Enables copying of products in admin interface