Add option to select all duplicate files from same folder

[elyahw]

Feature Description
...
Sometimes it is useful to pick and delete the duplicates which exist in a specific folder.

I suggest to add an option to the "select" button to select all duplicates from folder of the selected duplicate entry.

[LordDrakath]

The select button at the bottom. You can choose to select custom and set the path of the folder you want selected.