add original scale to JBDimension to check when a dimension object needs to be update

platform/util/src/com/intellij/util/ui/JBDimension.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2000-2015 JetBrains s.r.o.
+ * Copyright 2000-2016 JetBrains s.r.o.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -22,6 +22,8 @@ import java.awt.*;
  * @author Konstantin Bulenkov
  */
 public class JBDimension extends Dimension {
+  public final float originalScale = JBUI.scale(1f);
+
   public JBDimension(int width, int height) {
     super(scale(width), scale(height));
   }