When you click on "Deduplicate transactions" from the Transactions page, the popup that opens up doesn't have a button to exit. You can click escape, or click outside the popup, but there should be a 'CANCEL' button to close the window. The button should be placed to the left of the "SELECT TRANSACTIONS TO DELETE" button (the same way the "CANCEL" button exists in the FILTERS popup, next to the "APPLY FILTERS" button).