Some PDFs have CropBox or MediaBox entries stored as a PDFDict
instead of the expected PDFArray, causing pdf-lib to throw during
lookup.
Wrap both box lookups in try-catch and fall back to A4 dimensions
when neither can be parsed
This PR is handles the changes required to support envelopes. The new
envelope editor/signing page will be hidden during release.
The core changes here is to migrate the documents and templates model to
a centralized envelopes model.
Even though Documents and Templates are removed, from the user
perspective they will still exist as we remap envelopes to documents and
templates.
Lucas Smith
Ephraim Duncan
David Nguyen