MdSelect Performance Issues

#### Bug, feature request, or proposal:
On relatively slower devices (tested on Nexus 4), when we open Select list, select a value and close list the scrolling of page doesn't stays smooth.

#### What is the expected behavior?
Interaction with material component shouldn't create any side effect.

#### What is the current behavior?
Page scroll with jerkiness, after closing a select list with approx 100 list items.

Reproduce the issue on a slower device by opening and closing a select list containing about 100 items, then inspect the Angular Material MdSelect implementation and its scrolling behavior. Done means page scrolling remains smooth after the list is closed without introducing interaction side effects.

Written by the indexing model from the issue text.