OrderList incorrect multiple items reorder on move top\bottom

[DmitrySudakov]

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Current behavior

1. OrderList with three elements: [1, 2, 3].
2. Select elements 2 and 3, click MoveTop button.
3. OrderList becomes [3, 2, 1], button MoveDown stops working.

Expected behavior
3. OrderList becomes [2, 3, 1], button MoveDown is working.

Please tell us about your environment:

• PrimeNG version: 5.X
  6.1.3