Shortcut to jump to the oldest visible thread

[dataforxyz]

Ctrl/Cmd+1–9 lets me jump to the first nine visible sidebar threads. When I am viewing a long Waiting, Ready, or Done list, I would also like a shortcut to open the last thread in that list—the oldest one when the list is ordered newest first.

Please add a configurable keyboard command for this, following the list’s current sort and filters. It should do nothing if the list is empty.

This complements the numbered jump shortcuts. Related: #32798 asks for a visible Jump to top control; this request is to open the oldest thread directly.