title: Forcing the core-drawer-panel to be closed on startup
body: <p>I'm using core-drawer-panel to show a left-hand menu and right-hand content. I want the menu to be closed when I open the page by default.  I tried setting responsiveWidth to 9999px, which works, but the drawer is quickly shown, then hidden, every time I go to the page.  Is there a style I can apply or JS I can run before polymer is "stable" to get it to hide the menu?</p>