Overwrite scroll-behavior when setting scroll-position

[filipbech]

Bug, feature request, or proposal:

When a scroll-behavior is present and Material wants to set (not smoothly scroll to) a scroll-position, we should overwrite that css-property while changing the scroll-position.

What is the expected behavior?

That I wont notive

What is the current behavior?

I get a weird scrolling feeling

What are the steps to reproduce?

add scroll-behavior:smooth; to html element
scroll down and open a dialog. Close the dialog and see the smooth scrolling happen...

example plunkr:
https://plnkr.co/edit/kQNavjkozevBalxAq785?p=preview

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

New browser feature

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

all

Is there anything else we should know?

smooth-scrolling is not supported everywhere yet, so use newest chrome to reproduce

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