Hide construct/legacy blocks

core/src/mindustry/world/blocks/ConstructBlock.java

@@ -41,6 +41,7 @@ public class ConstructBlock extends Block{
         health = 20;
         consumesTap = true;
         solidifes = true;
+        inEditor = false;
         consBlocks[size - 1] = this;
         sync = true;
     }

core/src/mindustry/world/blocks/legacy/LegacyBlock.java

@@ -7,6 +7,7 @@ public class LegacyBlock extends Block{
 
     public LegacyBlock(String name){
         super(name);
+        inEditor = false;
     }
 
     /** Removes this block from the world, or replaces it with something else. */