Point of sale : show part description after scanning a part and setting qty, so it is obvious early on exactly what has been scanned

Bugfixes:

• Regression bug: Recent changes damaged ability to set notification settings during spares point of sale. SMS notification would be forced on default configuration
• Bugfix with parts on order for invoice with default setting, was not respecting the 'notify any/notify all' default/global configuration setting and was assuming 'notify any'