Significant sprite packing memory leak fixes

additional thanks to GlFolker for reporting issues with undisposed content icon pixmaps

core/src/mindustry/world/Block.java

@@ -1294,6 +1294,8 @@ public class Block extends UnlockableContent implements Senseable{
             }
         }
 
+        Seq<Pixmap> toDispose = new Seq<>();
+
         //generate paletted team regions
         if(teamRegion != null && teamRegion.found()){
             for(Team team : Team.all){
@@ -1318,6 +1320,7 @@ public class Block extends UnlockableContent implements Senseable{
                     Drawf.checkBleed(out);
 
                     packer.add(PageType.main, name + "-team-" + team.name, out);
+                    toDispose.add(out);
                 }
             }
 
@@ -1337,6 +1340,7 @@ public class Block extends UnlockableContent implements Senseable{
             Pixmap out = last = Pixmaps.outline(region, outlineColor, outlineRadius);
             Drawf.checkBleed(out);
             packer.add(PageType.main, atlasRegion.name, out);
+            toDispose.add(out);
         }
 
         var toOutline = new Seq<TextureRegion>();
@@ -1350,6 +1354,7 @@ public class Block extends UnlockableContent implements Senseable{
                 Drawf.checkBleed(outlined);
 
                 packer.add(PageType.main, regionName + "-outline", outlined);
+                toDispose.add(outlined);
             }
         }
 
@@ -1367,12 +1372,15 @@ public class Block extends UnlockableContent implements Senseable{
             packer.add(PageType.main, "block-" + name + "-full", base);
 
             editorBase = new PixmapRegion(base);
+            toDispose.add(base);
         }else{
             if(gen[0] != null) packer.add(PageType.main, "block-" + name + "-full", Core.atlas.getPixmap(gen[0]));
             editorBase = gen[0] == null ? Core.atlas.getPixmap(fullIcon) : Core.atlas.getPixmap(gen[0]);
         }
 
         packer.add(PageType.editor, name + "-icon-editor", editorBase);
+
+        toDispose.each(Pixmap::dispose);
     }
 
     public int planRotation(int rot){

core/src/mindustry/world/blocks/environment/Floor.java

@@ -177,6 +177,7 @@ public class Floor extends Block{
         }
 
         packer.add(PageType.environment, name + "-edge", result);
+        result.dispose();
     }
 
     @Override

core/src/mindustry/world/blocks/environment/OreBlock.java

@@ -69,6 +69,8 @@ public class OreBlock extends OverlayFloor{
                 packer.add(PageType.editor, "editor-block-" + name + "-full", image);
                 packer.add(PageType.main, "block-" + name + "-full", image);
             }
+
+            image.dispose();
         }
     }