8233562: [TESTBUG] Swing StyledEditorKit test bug4506788.java fails on MacOS

Reviewed-by: psadhukhan

Author: jayathirthrao

test/jdk/ProblemList.txt

@@ -778,7 +778,6 @@ javax/swing/dnd/8139050/NativeErrorsInTableDnD.java 8202765  macosx-all,linux-al
 javax/swing/Popup/TaskbarPositionTest.java 8065097 macosx-all,linux-all
 javax/swing/JEditorPane/6917744/bug6917744.java 8213124 macosx-all
 javax/swing/JTree/6263446/bug6263446.java 8213125 macosx-all
-javax/swing/text/StyledEditorKit/4506788/bug4506788.java 8233562 macosx-all
 javax/swing/JRootPane/4670486/bug4670486.java 8042381 macosx-all
 javax/swing/JRadioButton/ButtonGroupFocus/ButtonGroupFocusTest.java 8233555 macosx-all
 javax/swing/JRadioButton/8075609/bug8075609.java 8233555 macosx-all

test/jdk/javax/swing/text/StyledEditorKit/4506788/bug4506788.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2012, 2018, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2012, 2020, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -65,6 +65,7 @@ public void start() {
         Robot robot;
         try {
             robot = new Robot();
+            robot.setAutoDelay(100);
         } catch (AWTException e) {
             throw new RuntimeException("Robot could not be created");
         }
@@ -78,7 +79,6 @@ public void start() {
             throw new RuntimeException("Could not get JEditorPane location on screen");
         }
 
-        robot.setAutoDelay(50);
         robot.mouseMove(p.x, p.y);
         robot.mousePress(InputEvent.BUTTON1_MASK);
         robot.mouseRelease(InputEvent.BUTTON1_MASK);