Tweak config file to be more useful.

test/print3d/foo3d.conf

@@ -25,6 +25,13 @@ Attr collection materials-col-database {
 	Member integer material-diameter 285
 	Member rangeOfInteger material-temperature 190-230
 	Member keyword material-type "pla"
+},{
+	Member name material-name "Natural PLA"
+	Member keyword material-key "pla-natural"
+	Member keyword material-color "white"
+	Member integer material-diameter 285
+	Member rangeOfInteger material-temperature 190-230
+	Member keyword material-type "pla"
 }
 Attr collection materials-col-default {
 	Member name material-name "Blue PLA"
@@ -41,13 +48,20 @@ Attr collection materials-col-ready {
 	Member integer material-diameter 285
 	Member rangeOfInteger material-temperature 190-230
 	Member keyword material-type "pla"
+},{
+	Member name material-name "Red PLA"
+	Member keyword material-key "pla-red"
+	Member keyword material-color "red"
+	Member integer material-diameter 285
+	Member rangeOfInteger material-temperature 190-230
+	Member keyword material-type "pla"
 }
 Attr keyword materials-col-supported material-color,material-diameter,material-key,material-name,material-temperature,material-type
 
 Attr integer max-materials-col-supported 1
 
 Attr integer platform-temperature-default 60
-Attr rangeOfInteger platform-temperature-supported 0-100
+Attr rangeOfInteger platform-temperature-supported 50-100
 
 Attr keyword accuracy-units-supported nm,um,mm
 Attr collection print-accuracy-default {