More flexible coordinate format

[Rayerdyne]

Hi there !

I wanted to remove the y axis from the HUD, I could not, so I did this :-) I used regex, it may be a little overkill in complexity compared to simply add an trick to tell: no-y coordinate (I guess that nobody would use just x as coordinates for real lmao). It's thus possible just to display whatever string you want (<128 characters though), well it will not hurt anybody.

Love to y'all