Picklist multi select and move does not work if selecting items in reverse order

[FirstVertex]

Current behavior
When I multi select items in a Picklist and push move, nothing happens. This bug only happens if I selected the items from bottom to top (instead of sequentially).

Expected behavior
I expect the multi-selected items to move when I push the move buttons.

Minimal reproduction of the problem with instructions

1. Click the 3rd item in the Available list (Renault 2005)
2. Ctrl+Click the 2rd item in the Available list (Audi 2011)
3. Click the Move up button on the left list
4. Notice nothing happened when you push move up button

See demo: http://plnkr.co/edit/w7ehXk?p=preview

What is the motivation / use case for changing the behavior?
User needs to be free to choose items in any order, not just the sequential order.

Please tell us about your environment:
Windows 10, Visual Studio 2017

• Angular version: 2.0.X
  5.2.1

• PrimeNG version: 2.0.X
  5.0.0

• Browser: [all | Chrome XX | Firefox XX | IE XX | Safari XX | Mobile Chrome XX | Android X.X Web Browser | iOS XX Safari | iOS XX UIWebView | iOS XX WKWebView ]
  all

• Language: [all | TypeScript X.X | ES6/7 | ES5]
  TypeScript