Yes, that is definitely a good sign. My some acquaintances who got ERP-Scholarship the same in their portal (they have in their navigation menu to choose not only "Submit document regarding the funding", but also "Submit / change foreign bank data").
But as far as I know, reserved candidates have to select only "Submit document regarding the funding" in their navigation menu.
Let us know if you got scholarship! Then we will know exactly if the actual good sign is when in navigation menu "Submit / change foreign bank data") apperared ?