[Feature] Customizable level stats

[NightFright2k19]

1. It would be great if there was a way to adjust the optional level stats display (kills, items, secrets, skill). With "adjust" meaning: Being able to choose what you want to see. For example, personally I only need kills and secrets, so there should be a way to turn off the other stats. Especially useful if you also want to use this outside of the automap (i.e. as a permanent display).

2. Additionally, it could be considered to be able to choose the location of the stats, i.e. top left/right or bottom left/right (without being hidden by any messages or icons, ofc).

3. Outside of the automap, icons could be used instead of text for the stats names (kills/items/secrets) to reduce consumed space on the screen.