Lines in progress checklists

[TraianDanciu]

In progress checklists, at the very bottom of the table, the vertical lines do not stop on the horizontal line and it looks bad in my point of view.

Here is an example (link here)

[TraianDanciu]

In large progress checklists it looks even worse

[AlexVasiluta]

This is a Firefox bug, tracked here: https://bugzilla.mozilla.org/show_bug.cgi?id=1979695