Discorded breaks fontawesome icons

[bepstein111]

As mentioned in https://github.com/barrettford/Octoprint-Usb_keyboard/issues/15, Themify breaks fontawesome icons in some plugins. I've discovered that the Nighttime theme doesn't exhibit the same behavior, so that's a very basic workaround to get a similar looking theme for now.

Unsure of the difficulty of this fix, but I wanted to make sure it was documented.