Subject / Background mask creation progress dialog: Show no. of images and time left

What problem do you see this solving?

I want to know how many images have been processes and how many are pending, and the estimated time, just as with the preview generation dialog, so that I can judge how long C1 is blocked (if you keep the modal dialog) or how long it will occupy my hardware ressources.

When was the last time you were affected by this lack of functionality, or specific tool?

yesterday. And currently the dialog is blocking C1.