Add "Done" to dialog boxes

Some of the dialogs (like registering, or sending an ecard) lack any indication that they have succeeded. The user has to decide that he/she has waited long enough, and then dismiss the dialog by clicking on the Close Window button. Doing this can leave the user wondering if the task has just been cancelled.

It would be great if these dialogs could have a "Done" button -- preferably, one which is invisible or disabled till the process is complete. The Add Photo dialog works this way (mostly); there is a Done button and a visual indicator that files are being transferred. Even here, though, it would be nice to disable the Done button while a transfer is in progress.

Thanks!