Find duplicates: Provide the option to automatically delete duplicates based on different criteria

[jpablodrexler]

The application should present a set of options to allow the user to specify which duplicate from the different sets they want to keep, deleting the rest of the duplicates from the sets:

• [ ] Keep duplicate from parent folder
• [ ] Keep duplicate from sub folder
• [ ] Keep oldest duplicate
• [ ] Keep newest duplicate

Specifying which duplicate sets to process:

• [ ] Every duplicate set should display a checkbox to allow the user to specify if that specific duplicate set is included in the automatic delete.
• [ ] The application should provide the options to select all duplicate sets, unselect all and invert selection.