Reviewers: tbroyer, Description: Ensure that a horizontal submenu in a left to right locale is not drawn off the screen.
Patch from: http://code.google.com/p/google-web-toolkit/issues/detail?id=3888 Please review this at http://gwt-code-reviews.appspot.com/1876803/ -- http://groups.google.com/group/Google-Web-Toolkit-Contributors
