In macOsX:
Take list with items. Vertical.
Focus the first item.
Press shift+down.
Press cmd+down.
selected: 1st,2nd; focus on 3rd, expect anchor on 1st. Really, anchor is on 3rd, because
Press shift+down and get selected 3rd, 4th, but I expect 1st-4th.
That is mac-only.
Take list with items. Vertical.
Focus the first item.
Press shift+down.
Press cmd+down.
selected: 1st,2nd; focus on 3rd, expect anchor on 1st. Really, anchor is on 3rd, because
Press shift+down and get selected 3rd, 4th, but I expect 1st-4th.
That is mac-only.