Fix: when moving A, B, C, D  (where structure is A/B/C) together to E might cause curAbsIdx = -1 when processing C (or when processing A if drop after).
Fix: when moving A, B, C, D  (where structure is A/B/C) together to E might cause curAbsIdx = -1 when processing C (or when processing A if drop after).

- @TODO: this is a somehow dirty fix, try a better way if possible

danny0838/firefox-scrapbook,danny0838/firefox-scrapbook