drawSelect for RepairTower (#7447)

core/src/mindustry/world/blocks/units/RepairTower.java

@@ -110,5 +110,10 @@ public class RepairTower extends Block{
         public float warmup(){
             return warmup;
         }
+        
+        @Override
+        public void drawSelect(){
+            Drawf.dashCircle(x, y, range, Pal.placing);
+        }
     }
 }