Changes damage overlay threshold from 10+ to 35+

- Changes the damage overlay thresholds so they start displaying when you are a bit more damaged than currently. There are six damage overlays, their thresholds used to be 10-25; 25-40; 40-55; 55-70; 70-85; 85-infinity. This change sets them to 35-45; 45-55; 55-65; 65-75; 75-85; 85-infinity. (The thresholds are the sum of fireloss, bruteloss and the hit indicator variable)
- Oxyloss overlay left unchanged, since you pass out at 50 or something, so you need the visual cue quicker.

Main reason for this proposed change is that I feel the overlays kick in too quickly. I think it'd be good to leave a little room, so you don't get an overlay as soon as the first moron boops you over the head with his crowbar.