Extra legacy block substitution / iOS fixes

core/src/mindustry/world/Block.java

@@ -617,7 +617,7 @@ public class Block extends UnlockableContent{
     public ItemStack[] researchRequirements(){
         ItemStack[] out = new ItemStack[requirements.length];
         for(int i = 0; i < out.length; i++){
-            int quantity = 60 + Mathf.round(Mathf.pow(requirements[i].amount, 1.12f) * 20 * researchCostMultiplier, 10);
+            int quantity = 60 + Mathf.round(Mathf.pow(requirements[i].amount, 1.1f) * 20 * researchCostMultiplier, 10);
 
             out[i] = new ItemStack(requirements[i].item, UI.roundAmount(quantity));
         }

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

@@ -8,4 +8,9 @@ public class LegacyBlock extends Block{
     public LegacyBlock(String name){
         super(name);
     }
+
+    /** Removes this block from the world, or replaces it with something else. */
+    public void removeSelf(Tile tile){
+        tile.remove();
+    }
 }

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

@@ -1,9 +1,12 @@
 package mindustry.world.blocks.legacy;
 
 import arc.util.io.*;
+import mindustry.content.*;
 import mindustry.gen.*;
+import mindustry.world.*;
 
 public class LegacyUnitFactory extends LegacyBlock{
+    public Block replacement = Blocks.air;
 
     public LegacyUnitFactory(String name){
         super(name);
@@ -13,6 +16,12 @@ public class LegacyUnitFactory extends LegacyBlock{
         solid = false;
     }
 
+    @Override
+    public void removeSelf(Tile tile){
+        int rot = tile.build == null ? 0 : tile.build.rotation;
+        tile.setBlock(replacement, tile.team(), rot);
+    }
+
     public class LegacyUnitFactoryBuild extends Building{
 
         @Override