ContextMenu freeze with routerLink and appendTo=body

[Danieleeee]

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[x] bug report => Search github for a similar issue or PR before submitting
[ ] feature request => Please check if request is not on the roadmap already https://github.com/primefaces/primeng/wiki/Roadmap
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Current behavior

When you click on items of the ContextMenu that are routerLink it freezes (remains open) after the new route/page is opened.
This happens when you use appendTo=body in the property of the ContextMenu.

• Angular version: 2.4.8

• PrimeNG version: 2.0.1

• Browser: [Chrome | IE 11]

• Language: [ TypeScript | ES5]