[IE] Errors thrown when opening any IgxGrid

[zdrawku]

Description

A JS errors are thrown when using any IgxGrid under IE.
The error is:
ERROR TypeError: Object doesn't support property or method 'forEach'

Steps to reproduce

1. Navigate to any IgxGrid sample on the staging, for example

2. Look at the browser console.

Result

JS errors are thrown.

Expected result

JS errors should not be thrown.

Attachments

Findings:

The issue started to appear after upgrading of the angular-cli version.

There is a recommendation how to load polyfills correctly:
angular/angular-cli#6577
Possible Fix: https://github.com/angular/angular/pull/16805/files

[bkulov]

The issue is the same as #1531.
The problem is that NodeList type used in text-highlight.directive.ts doesn't support forEach in IE and doesn't have polyfill.