Add new "VerifyAfterCopy" option in copy dialog

[Biozynotiker]

The new "Verify after copy" is a nice feature and
this should also accessable in the copy dialog.
Turning on/off via configuration menu is very annoying and time consuming.

[MVV]

I agree that it is not needed always but sometimes may be useful...

BTW I think there may be some INI option that will set which copy options will be displayed in dialog. Keep structure while copying from branch view item is already configurable.