Add newline before itemstring in item tooltip

[Wuzzy2]

Because I think it's a bit more pleasant to read that way because the “real” item name and the internal one are visually more separated.

How to test:

1. Enable tooltip_append_itemname
2. Start a game and hover some items

[Wuzzy2]

Also, the tooltip for “Blueberry Bush Leaves with Berries [default:blueberry_bush_leaves_with_berries]” is too long when on a single line. ;)

[paramat]

Yes good idea to avoid long lines.
Assuming you've tested 👍

[Wuzzy2]

Yes, tested.

[ClobberXD]

Yay, 3 approvals! :)