* Improved session cache's config parameters to reduce config file queries
* Removed unused methods
* Changed some SP_Crypt class methods to static and factorized some functions
* Added some stuff to demo mode
* Improved categories management by removing 'select' by 'table' style layout.
* New permissions added for customers and categories management menu (needs DB update).
* Some methods have been refactored and made a bit of code cleanup
* New layout for account searches. Now accounts are showed in a card fashion style, no more rows ;) and colorized customer name for better visualization.
* Some UI improvements for better fit on small screens