[enhancement] Shopping list should not jump to the beginning

[vanMacG]

When in "shopping mode" and I mark an entry as done, the list just stays at this point.
When in the regular shopping list, click on a list entry and jump to "purchase". After purchase, when coming back to the list, it always jumps to the beginning.
Would it be possible to save the scroll position of the list (as in shopping mode)?

(Use case: I order the products in categories as they apear in the supermarket. I.e. frozen stuff is on the last position. When coming home I want to "purchase" them first, and every time I have to scroll down again.)