Fixing minor issue with widget api and removing homepage menu

DependencyInjection/Widget/AddWidgetConfigurationTrait.php

@@ -167,13 +167,18 @@ trait AddWidgetConfigurationTrait
                 ->info("the ordering of the widget. May be a number with decimal")
                 ->example("10.58")
                 ->end()
-            ->enumNode(WidgetsCompilerPass::WIDGET_CONFIG_ALIAS)
-                ->values($this->getWidgetAliasesbyPlace($place, $containerBuilder))
-                ->info("the widget alias (see config for your bundle)")
+            ->scalarNode(WidgetsCompilerPass::WIDGET_CONFIG_ALIAS)
+                // this node is scalar: when the configuration is build, the
+                // tagged services are not available. But when the config reference
+                // is build, the services are avaialble => we add the possible aliases
+                // in the info.
+                ->info("the widget alias (see your installed bundles config). "
+                        . "Possible values are (maybe incomplete) : ".  
+                        \implode(", ", $this->getWidgetAliasesbyPlace($place, $containerBuilder)))
                 ->isRequired()
             ->end()
         ;
-    
+            
         // adding the possible config on each widget under the widget_alias
         foreach ($this->filterWidgetByPlace($place) as $factory) {
             $builder = new TreeBuilder();
@@ -207,6 +212,10 @@ trait AddWidgetConfigurationTrait
      * get the all possible aliases for the given place. This method
      * search within service tags and widget factories
      * 
+     * **Note** that services are not available when the config is build: the whole 
+     * aliases will be checked in compiler pass, or when the command
+     * `config:dump-reference` is runned.
+     * 
      * @param type $place
      * @param ContainerBuilder $containerBuilder
      * @return type
@@ -219,7 +228,7 @@ trait AddWidgetConfigurationTrait
         foreach ($this->filterWidgetByPlace($place) as $factory) {
             $result[] = $factory->getWidgetAlias();
         }
-        
+
         // append the aliases added without factory
         foreach ($containerBuilder
             ->findTaggedServiceIds(WidgetsCompilerPass::WIDGET_SERVICE_TAG_NAME)