Removed [map] "button"

The [map] "button" was superfluous on the contact page. Change the "Work
Address" and other address headers to be the link.
Moved upload progress indicators between note and buttons
Unified thumbnail generation to just thumb.jpg

Instead of separating thumbnail processing into jpeg/png vs pdf, we are
just going to create a JPEG thumbnail named "thumb.jpg". That's it.
Placeholder icons for non-image uploads
Improved thumbnails and placeholder icons