IE11: Datepicker cannot be dismissed by user interaction after being opened programmatically

[julianobrasil]

Bug, feature request, or proposal:

Looks like a bug

What is the expected behavior?

It should be possible to close the calendar after open it programmatically.

What is the current behavior?

The datepicker, after being opened programmatically cannot be closed by user interactions.

What are the steps to reproduce?

Open it in IE11: https://stackblitz.com/edit/open-calendar-on-focus

What is the use-case or motivation for changing an existing behavior?

According to the Material2 Description (Github) the components should work fine in IE11

Which versions of Angular, Material, OS, TypeScript, browsers are affected?

Apparently, just IE11

Is there anything else we should know?

[angular-automatic-lock-bot]

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