Add customer extensions, switch enhanced grids

* Fix full trace issue with internal functions
* Add Yoast MetaRobots extension
* Add Offi Customer Attributes Manager extension
* Add SchumacherFM CMS Restriction
* Add Netzarbeiter Customer Activation
* Add Netzarbeiter Groups Catalog 2
* Add BL Enhanced Admin Grids (closes #1)
* Remove TBT Enhanced Product Grid