Fix dynamic loading in debug mode.

static/app.js

@@ -4,15 +4,30 @@
  */
 
 // Activate the dynamic loading for Ext JS and application classes
-Dbui.setDynamicLoading(Dbui.debug);
+if (Dbui.debug) {
+    Ext.Loader.setConfig({
+        disableCaching: false,
+        enabled: true,
+        paths: {
+            'Dbui': '/' + Dbui.name + '/static/plugin_dbui/src',
+            'Ext': '/' + Dbui.name + '/static/plugin_extjs/src',
+            'TrackEvents': '/' + Dbui.name + '/static/track_events/src'
+        }
+    });
+}
 
 Ext.require('Dbui.container.Viewport');
 Ext.require('Dbui.plugin.MathJax');
+
 Ext.require('Ext.direct.Manager');
 Ext.require('Ext.direct.RemotingProvider');
 Ext.require('Ext.EventManager');
 Ext.require('Ext.tip.QuickTipManager');
 
+Ext.require('TrackEvents.form.field.UserData');
+Ext.require('TrackEvents.form.field.UserDataMultiDefault');
+Ext.require('TrackEvents.form.plugin.UserDataConsistency');
+
 Ext.onReady(function(){
 
     "use strict";

static/track_events/src/form/field/UserDataMultiDefault.js

-// require to load the base class when running in debug mode
-Ext.Loader.setPath('Dbui', '../static/plugin_dbui/src');
-
 /**
  * A dictionary handling several user data block definition.
  * It is linked to a ComboBox allowing to select the event and