#### Bug, feature request, or proposal: MdSnackBar is not showing up on Safari / iOS 10.3.1 / iPhone 6s apparently is hidden behind the bottom toolbar of safari #### What is the expected behavior? to show up normally #### What is the current behavior? it doesn't show up #### What are the steps to reproduce? just open a snackbar in any component #### Which versions of Angular, Material, OS, TypeScript, browsers are affected? angular ^4.1.0 starting from Material 2.0.0-beta.4 iOS 10.3.1 typescript ^2.3.2 safari iPhone 6s #### Is there anything else we should know? no