Display pdfs in dashboard

[cbkerr]

Feature description

Dashboard should be able to display pdfs or vector graphics formats.

Additional context

@tcmoore3 was outputting project level phase diagrams as pdfs

[bdice]

SVGs would be much lighter weight for the browser, if that's an option. It can be very slow to have a page load with multiple PDFs rendering (grid view with multiple jobs). I think this might "just work" for SVG files if you specified SVGs in the filename matching globs of an ImageViewer module.

[tcmoore3]

Confirming that this "just works" for SVG files when you specify SVGs in the filename matching globs of an ImageViewer module.