"Show new items" keyboard shortcut should also scroll up to the top of the page

[Kalytis]

When screen isn't on the top of the list, Show new items shortcut adds them to the top of it, but stays at the place where the scroll is (items on focus go down, as new items are inserted at the top of the list), even though using this shortcut manifests a will to see new items.

The keyboard shortcut should still show new items, but also bring the scrolling to the top of the page.

[stackblitz]

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