Release v4.158.1

Fixed

• Specifications in a rendered application's separate Specs project now compile and run in Release as well as Debug. They are no longer excluded by #if DEBUG, while the web application continues to exclude the specification files. (part of #498)
• Rendered specifications declare repeated and complex fixture values once as named fields and use separate facts for expected properties, instead of repeating literals in long predicates. (part of #498)
• Rendered authorization-denial specifications assert that the command is denied and appends no events, rather than merely checking policy registration. (part of #498)