<% Root.layoutchooser %>
proxy macro for LayoutMgr.layoutchooser

Sourcecode in Root/macros.js:
1:   function layoutchooser_macro(param) {
2:      if (root.sys_layout)
3:         param.selected = root.sys_layout.alias;
4:      root.layouts.layoutchooser_macro(param);
5:      return;
6:   }