test/java/awt/Mouse/MouseDragEvent/MouseDraggedTest.java

rev 14031 : 8160974: [TESTBUG] Mark more headful tests with @key headful.

This is a backport of fe58d505fffd from jdk9. 228/596 hunks apply without
modifications. 16 hunks required manual rework. The remainder were for files
not present in jdk8u.

@@ -24,10 +24,11 @@
 import java.awt.*;
 import java.awt.event.*;
 import javax.swing.*;
 /*
  * @test
+ * @key headful
  * @bug 8080137
  * @summary Dragged events for extra mouse buttons (4,5,6) are not generated
  *            on JSplitPane
  * @author alexandr.scherbatiy area=awt.event
  * @run main MouseDraggedTest