Upload PDF item

[nanomosfet]

Right now the upload PDF button just creates a link.

We want to create make the upload pdf feature work. We can use a similar way of doing this like the image upload.

This will include the initial adding of the pdf upload, which will create an objectURL and then when the save action occurs we upload this to the server which creates a file.

We need to also adjust the display component (not editable component) to link to the uploaded version.