Enable use of value types as for models.
Allow changing the MenuPart name as it is used to control the HTML element id.
Fix directly nested ul elements when not showing the root node.
Add responsive menu that collapses under a toggle button using bootstrap.
Merge branch 'master' into menu_enhancements
Merge remote-tracking branch 'origin/value_type_editor_support' into menu_enhancements
Merge pull request #388 from petedavis/menu_enhancements

Menu enhancements