Bugfix user_errors causing failed install

Along with fixing the ProductPage requiredDefaults error on installation I found other error spots that didn't allow for a clean dev/build. I've adjusted them for use in the cms rather than having it cause a failure on dev/build. Some will need to be revisited to further error declaration/implementation.

fixes #81
This may need to be reworked to allow for some kind of error, was removed as it triggered an error on dev/build.