Beyond The End - Inventory Remote Storage

Fix off-hand item lost when opening the storage with a two-handed weapon

Opening the storage puts a fake storage remote in the off-hand and then
restores the previous off-hand item. The previous item was read with
getOffhandItem(), but Better Combat makes that return empty while a
two-handed weapon is held, so the empty stack was restored and the
off-hand item was lost. The real off-hand slot is now read instead.