add shallow cloning
add cloning to sets
add action sheet to support multiple actions on sets
use enum to differentiate actions
use block for action view
add cloning action
remove comment
make code clearer
select previous song differently
reindent
move app icons and launch images in own asset catalogues
fix resizing
add script to resize launch image
clone only attributes
support to clone song set items
update project file for cloning categories
add callbacks for product purchase or restore
if purchased in own method
add blocks to restore and purchase
move ui code