Missing icons in Modus theme

[Wdavery]

Currently the icons do not show up using the new default modus theme, but works as expected in the older elegant theme.
Also works as expected to alter the css of the page to call for a different icon (like 'pwg-icon-slideshow') as a visual placeholder.

[james-t-richardson-ii]

I got this working on modus #11 . Not sure if it's the right way or not =)