Add a counter of the current image relative to all in the current folder.

[csfedorov]

Thank you so much for you product!

When viewing a large number of images it would be useful to know how many have been viewed and how many are left to view.

Please add the current item number of all items in the viewer.
Make the counter contrasting, as it may fall on a white or black background.
Example:
If 15 files out of 90 are currently being viewed: 15 / 90
If moved to the next one: 16 / 90

It may be convenient to place the counter in the places marked on the screenshot.