Import and display PDF slides

As a Presenter user, I would like the ability to import and view PDF slides, as an alternative to PowerPoint and Google slides. This is especially important because I use Presenter on Linux workstations where PowerPoint is not supported. PDF is a pretty universal format with many libraries to support displaying them.

And what is odd about the lack of direct PDF import is that the PowerPoint importer in Presenter converts the presentations to PDFs to are stored for Presenter to display the slides without the PowerPoint app running. You'll see this conversion to PDFs in action when importing a large PowerPoint file (dozens of slides), and you'll see a status message that the import script is converting the file to a PDF.