The PDF Preview of Archive Item Attachments rarely works

[datajohnson]

Context

Describe the bug
A clear and concise description of what the bug is.

To Reproduce
Steps to reproduce the behavior:

1. Go to an archive item that has an attachment
2. Click on the "Preview" button next to a PDF item
3. It should open a dialog and show the PDF in the main panel
4. It likely won't render the PDF at all

Expected behavior
The PDF should show in the body of the dialog after it loads