Comment 4 for bug 1646166

Rebased to master and force-pushed to same branch.

Branch includes a fix for the remote html print issue in the previous comment. In summary, we want to avoid inserting the print CSS when printing remotely.

The commit includes some egPrint refactoring to create more obvious separation between remote vs. in-browser printing. Functionality should be the same w/ one exception, in the in-browser print code, I modified it to fail when the print CSS fails to load, w/ the assumption that printing w/o the print CSS (which would be the print data, plus the rest of the page) is probably not what the user wants.