Stock specifications

Backup database to file option added
Burn database backup option added
Restore from backup option added ??Users can now be double-clicked in the basket to select and close the window
User authorisation support added
Sales viewer toolbar added
Receipt creation from sales viewer added
Keyboard navigation added to many tables
Window position and sizes are now saved in more windows
Saving in customer manager now always re-selects the user you were editing
Currency now shown in receipts and other places
New receipt preferences for number ID from and number ID prefix
Updated to SM2DGraphView 1.2.1 framework
Other minor feature changes and improvements throughout
Major selection bug fixed which could cause possible data loss in the stock manager
Major selection and editing bug fixed which could cause possible data loss in customer manager
Major bug in customer manager which caused possible data loss after save fixed
Significant bug that allowed creation of multiple stock categories with the same name fixed
Significant bug in stock item inspector fixed which caused it to only display once
Minor bug that displayed nothing when a stock category was selected and deleted fixed
Other minor bug fixes throughout