description:
cancel action in confirm replace dialog should not close export item dialog.

test build:2.6.0.v20100329-0630

steps to reproduce:
1. insert an embedded image to report.
2. export the image to a library file.
3. select the image and export to the same library file again.
4. select library in export item dialog, then pop up confirm replace dialog, click cancel

expected result:
back to export item dialog for user to choose another library file

actual result:
close both dialogs
this is not a issue,click the no button to back to export item dialog for user to choose another library file
c