Improve error handling in knop_database.lasso

[stevepiercy]

In knop_database -> saverecord, early errors get trampled by later errors when working with record locks, and are not captured properly and placed on the stacktrace.

To Replicate

• Checkout commit 8baeda31a6e4c01147484bfda505b194588684d0
• Login and navigate to Customers Advanced, click an item, edit it, then try to save it.

[stevepiercy]

Fixed in f9c8e69e12b039a870803338fd60f8b30a546dd3