Info window renders mislocated when used with *ngIf

[svarzee]

Issue description
If the *ngIf condition at an info window is set to false and then it changes to true, then the info window is rendered mislocated.

Steps to reproduce and a minimal demo of the problem

1. Create a map with a marker and an info window anchored to the marker. The info window should have *ngIf.
2. Change the *ngIf condition to false and then to true.
3. Click on the marker.
4. The info window renders mislocated.

Use switch foo button to change *ngIf condition.
http://plnkr.co/edit/UGzbxh3GDQDGDC8kwweX?p=preview

Current behavior
Info window is rendered mislocated.

Expected/desired behavior
Info window should be located just above the marker.

angular2 & angular2-google-maps version
angular 2.1.2
angular2-google-maps 0.16.0

[svarzee]

I believe I figured out how to fix it, I'll create a pull request soon.