fix logic for incrementing/decrementing transcript edited lines count
fix logic for incrementing/decrementing transcript edited lines count

NYPL/transcript-editor,slnswgithub/nsw-state-library-amplify,NYPL/transcript-editor,slnswgithub/nsw-state-library-amplify,slnswgithub/nsw-state-library-amplify,NYPL/transcript-editor