Double values are truncated /rounded

When defining a property type 'double', the resulting scaffolding forms will display only 3 decimals of it, and, even worse, when editing the prefilled value will be rounded and not the value in the database.

Start by reproducing the issue with a Grails property declared as type 'double' and inspect the generated scaffolding forms for display and editing behavior. Trace the scaffolding entry point and any relevant form or number-formatting code; done means preserving the database value and displaying more than three decimals without rounding the prefilled value.

Written by the indexing model from the issue text.