Added document level security

Fixed AWC-407
Added helper to Application to get client config

git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@2114 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

source/java/org/alfresco/web/bean/NavigationBean.java

@@ -540,10 +540,7 @@ public class NavigationBean
     */
    private void initFromClientConfig()
    {
-      this.clientConfig = (ClientConfigElement)Application.getConfigService(
-            FacesContext.getCurrentInstance()).getGlobalConfig().
-            getConfigElement(ClientConfigElement.CONFIG_ELEMENT_ID);
-      
+      this.clientConfig = Application.getClientConfig(FacesContext.getCurrentInstance());
       this.helpUrl = clientConfig.getHelpUrl();
       this.shelfExpanded = clientConfig.isShelfVisible();
    }