adding support for wcm tinymce extensions to create html from web content wizard

- extracted file picker backing code into its own bean
- refactoring for to extract file picker bean
- refactoring to manage uploads from file picker outside of xforms context
- added some language utility methods to common.js
- refactored extension dialogs to deal with quirkyness of tinymce dialog codebase on IE - mostly works now and addressed bug WCM-471
- resourcifying a couple strings i missed in filepickerbean

git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@5675 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

source/web/scripts/ajax/ajax_helper.js

@@ -36,11 +36,14 @@ alfresco.AjaxHelper = function()
 {
 }
 
+/** All pending ajax requests. */
+alfresco.AjaxHelper._requests = [];
+
 /** Creates an ajax request object. */
 alfresco.AjaxHelper.createRequest = function(target, serverMethod, methodArgs, load, error)
 {
   var result = new dojo.io.Request(alfresco.constants.WEBAPP_CONTEXT + 
-                                   "/ajax/invoke/XFormsBean." + serverMethod, 
+                                   "/ajax/invoke/" + serverMethod, 
                                    "text/xml");
   result.target = target;
   result.content = methodArgs;
@@ -97,9 +100,6 @@ alfresco.AjaxHelper._getLoaderElement = function()
   return result;
 }
 
-/** All pending ajax requests. */
-alfresco.AjaxHelper._requests = [];
-
 /** Updates the loader message or hides it if nothing is being loaded. */
 alfresco.AjaxHelper._updateLoaderDisplay = function()
 {