#### Bug, feature request, or proposal: feature #### What is the expected behavior? clicking md-select should disable scroll #### What is the current behavior? md-option position is fixed to screen view  #### What are the steps to reproduce? Plunker: http://plnkr.co/edit/BkHyLxy1EPYEMLDCe5Tv?p=preview #### What is the use-case or motivation for changing an existing behavior? Clicking md-select should disable scroll, to allow user to scroll in md-option list. #### Which versions of Angular, Material, OS, browsers are affected? all #### Is there anything else we should know? no