Cleanup followup posting specs.

Move to be with followup viewing specs, factor out default request
params, add in expectations for error messages.
Factor out default params to make specs clearer.
Add spec for internal review.
Test for empty body.
Factor out the default session params

Hopefully this makes the differences in each spec a bit clearer.
Add some specs for internal review handling.
Font styles need to be preprocessed for font-path calls.