Feature Request: Add option to display the Ranks and Files

[KairuDeibisu]

I appreciate it if you could add the option to see the rank numbers and file letters on the side of the board.

[chrisgrieser]

I made a PR which fixes this. Until it's merged, you can add the following CSS snippet to display rank/files again:

body .cg-wrap coords {
  opacity: 1 !important;
}