test/javax/swing/JComboBox/8057893/bug8057893.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.

@@ -32,10 +32,11 @@
 import javax.swing.WindowConstants;
 import sun.awt.SunToolkit;
 
 /**
  * @test
+ * @key headful
  * @bug 8057893
  * @author Alexander Scherbatiy
  * @summary JComboBox actionListener never receives "comboBoxEdited"
  *   from getActionCommand
  * @run main bug8057893