fix set setGroupPath issue when creating a new user inside a subgroup

There is a bug when a user with an administrator profile create another user inside a sub group.
For instance if you create a new user in a subgroup such as "group/subgroup" the groupPath is wrong is ajxp_users table : "groupsubgroup" instead of "group/subgroup".
I fix this bug editing "/var/www/ajaxplorer-core/core/src/plugins/access.ajxp_conf/class.ajxp_confAccessDriver.php" file.
Removing the "ltrim" function fixes the problem.
greetings,
ben