More descriptive error messages in Design Manager

[Thomas_DCA]

Error messages in the Design Manager should be much more detailed than they currently are.

I received this error message in the console which was preventing me from publishing a template:

1. Error: Cannot resolve property ""

It was completely unhelpful in identifying and fixing the error. It turned out to be some extra curly braces in a custom module which should not have been there, but I only figured that out because of randomly checking various modules on the template.

At the very least the error message should indicate which module is causing the issue to narrow down our troubleshooting.