gl_highlighting: separate colors for containers and corpses

- Items and corpses blending together can be an issue

artifacts/config_files/sfall-mods.ini

@@ -15,7 +15,7 @@ Critters=0
 ; Set to 1 to only highlight objects in the player's line-of-sight
 CheckLOS=1
 
-; Set the color of outlines for items, corpses, and containers; available colors:
+; Set the color of outlines for items; available colors:
 ; 1 - glowing red
 ; 2 - red
 ; 4 - grey
@@ -26,6 +26,12 @@ CheckLOS=1
 ; You can set a custom color from the game palette by multiplying the color index value by 256 (in 4.2.7 or later)
 OutlineColor=16
 
+; Set the color of outlines for corpses
+OutlineColorCorpses=4
+
+; Set the color of outlines for containers
+OutlineColorContainers=4
+
 ; Motion Scanner mode:
 ; 0 - ignored
 ; 1 - requires Motion Sensor to be present in the player's inventory to activate highlighting