Change title in browser title bar for group categories (Bug 1285892)

Change title that appears in the browser title bar
from "Groups" to "Group categories" in "Administration"

Change-Id: I2945d6a23c907647881e5ba026ad48ee88d13bba
Signed-off-by: Kristina D.C. Hoeppner <kristina@catalyst.net.nz>

htdocs/admin/groups/groupcategories.php

@@ -14,7 +14,7 @@ define('ADMIN', 1);
 define('MENUITEM', 'managegroups/categories');
 
 require(dirname(dirname(dirname(__FILE__))) . '/init.php');
-define('TITLE', get_string('groups', 'admin'));
+define('TITLE', get_string('groupcategories', 'admin'));
 
 $optionform = pieform(array(
     'name'       => 'groupcategories',