make selection show selected blocks

Client/src/main/java/com/baseband/client/feature/world/Select.java

@@ -33,6 +33,19 @@ public class Select extends Feature {
         selection = event.getMySelection();
     }
 
+    @Override
+    public void onTick() {
+        if(selection != null)
+            text = this + "§7 [" + selection.area() + "B]";
+        else
+            text = this + "§7 [0B]";
+    }
+
+    @Override
+    public void onDisable() {
+        text = this.toString();
+    }
+
     @Override
     public String toString() {
         return "Select";