Extracts call to Behaviour.specify so that it will be applied to elements in page at load time

war/src/main/js/widgets/config/tabbar.js

@@ -5,13 +5,25 @@ import tableMetadata from './model/ConfigTableMetaData';
 import behaviorShim from '../../util/behavior-shim';
 import jenkinsLocalStorage from '../../util/jenkinsLocalStorage';
 
+/**
+ * Extracting this call from outside of the addPageTabs due to a regression
+ * in 2.216/2.217
+ *
+ * The proxied call to Behaviour.specify needs to be called from outside of the
+ * addPageTabs function. Otherwise, it will not apply to existing draggable
+ * elements on the form. It would only only apply to new elements.
+ *
+ * Extracting this Behaviour.specify call to the module level causes it to be executed
+ * on script load, and this seems to set up the event listeners properly.
+ */
+behaviorShim.specify(".dd-handle", 'config-drag-start', 1000, function(el) {
+    page.fixDragEvent(el);
+});
+
 export var tabBarShowPreferenceKey = 'config:usetabs';
 
 export var addPageTabs = function(configSelector, onEachConfigTable, options) {
     $(function() {
-        behaviorShim.specify(".dd-handle", 'config-drag-start', 1000, function(el) {
-            page.fixDragEvent(el);
-        });
 
         // We need to wait until after radioBlock.js Behaviour.js rules
         // have been applied, otherwise row-set rows become visible across sections.