Describe the bug
on some systems (so far linux fully tested), the default system fonts do not include some symbols used in cstate.

Expected behavior
symbols choosen would work across most/all systems. Instead the standard unicode BOX is shown.

Desktop (please complete the following information):

• OS: RHEL 7.x 8.X and Ubuntu 16.04
• Browser all browswers

Additional context
while this is not techincally a cstate issue (its a font issue), it would make sense to offer a way to make this not dependiant on symbols - ie RIGHT ARROW becomes [+] and down arrow becomes [-] or similar