grid search/replace

http://shrani.si/f/3h/BF/2Ts5o8D0/tmp.jpg

can you please add (ignore duplicates) checkmark (& functionality)to the left box please.

Now user gets trapped into zilion clicks or process kill.

That is, you can't cancel left box coz right boxes & similar are popping up.

Ignore duplicates would do the trick nicely, & possible message on the end, that some records were ignored due to duplicate problem

Mybe even , default "ignore duplictaes" & message at the end of replacement.