send _UPDATE_ messages (WindowLayer now overrides that method). git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@15129 a95241bf-73f2-0310-859d-f6bbb57e9c96
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@15128 a95241bf-73f2-0310-859d-f6bbb57e9c96