Need to load wall block the non-ajaxify way (Bug #1423768)

The wall post form fails to work when block loaded via ajax

Change-Id: Ic0414ab7b69ee821815162b749217cb377950d20
Signed-off-by: Robert Lyon <robertl@catalyst.net.nz>

htdocs/blocktype/wall/lib.php

@@ -13,6 +13,10 @@ defined('INTERNAL') || die();
 
 class PluginBlocktypeWall extends SystemBlocktype {
 
+    public static function should_ajaxify() {
+        return false;
+    }
+
     public static function get_title() {
         return get_string('title', 'blocktype.wall');
     }