Make schematics build insulated blocks first, power nodes last (#4414)

* Make schematics build insulated blocks first, power nodes last

* Add schematicPriority property to sort by

* Assign schematicPriority of 10 to power diode

core/src/mindustry/content/Blocks.java

@@ -788,6 +788,7 @@ public class Blocks implements ContentList{
             health = 130 * wallHealthMultiplier;
             insulated = true;
             absorbLasers = true;
+            schematicPriority = 10;
         }};
 
         plastaniumWallLarge = new Wall("plastanium-wall-large"){{