Undo button is disabled after replace all

[styu]

Reproduction:

1. Open Replace textareas by class name
   
2. Click on the Find button
   
3. Click on 'Replace' tab
   
4. Type in some replaceable text into 'Find what' (eg.: 'are')
   
5. Type in some text into Replace with (eg.: 'replaced')
   
6. Click on Replace All
   
7. Click on 'OK', and close the dialog
   

Now the undo button is disabled (but you can undo the replace too, after type in a character into the editor area).

[Artur Formella]

JS error in find.js (line 448)

this.matchRange is null
448: this.matchRange.moveNext();

[Garry Yao]

Fixed with [3678]. Click here for more info about our SVN system.