add legacy script

dashboard-ui/components/viewcontainer-lite.js

@@ -33,6 +33,7 @@ define(['jQuery'], function ($) {
                 dependencies.push('jqmcollapsible');
                 dependencies.push('jqmcheckbox');
                 dependencies.push('legacy/dashboard');
+                dependencies.push('legacy/selectmenu');
             }
 
             if (isPluginpage || (newView.classList && newView.classList.contains('type-interior'))) {

dashboard-ui/legacy/selectmenu.js

@@ -0,0 +1,5 @@
+// TODO: This needs to be deprecated, but it's used heavily by plugins
+$.fn.selectmenu = function () {
+    // No-op. This implementation only exists to prevent script errors
+    return this;
+};