Up and down arrow characters do not display

[rjaltman]

As title. This can be viewed by going into Change Preferences on a project page.

This should be a really simple fix, just formalizing the issue so we eventually get to it.

[ddsnowboard]

I'm assuming this is an issue for more than just @rjaltman, but he's the only one (to my knowledge) that's observed it, so I think it would be easiest for him to fix it. It shouldn't take that long. Worst case scenario, we have to replace those arrows with images or something.