AutoComplete - Suggestions display issue when suggestions above

[MarkPerryBV]

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Current behavior
If the list of suggestions needs to render above the textbox then when you narrow the selection the suggestions box detaches from the textbox element.

Expected behavior
The suggestions list need to stay anchored to the element. Either above or below.

Minimal reproduction of the problem with instructions

• Angular version: 2.0.X
  Latest

• PrimeNG version: 2.0.X
  Latest

• Browser: [all]

• Language: [all]

[cagataycivici]

This works fine with Angular 4.1.0, unfortunately 4.2.0 and newer broke it, so had to add a workaround for the fix.