Offer a cancel / abort button on the duplicate screen
Although I have since found that pressing escape can cancel an ongoing import, it would be useful if the duplicate match screen offered a button which could terminate the import.
If users accidentally try to import the same file twice, repeatedly clicking "skip" can be very time consuming. Additionally, pressing "escape" is a non-visible solution that may not be obvious to less experienced users.
Perhaps this button could appear when two (or more) consecutive records have been skipped as duplicates?