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.

*** 32,41 ****
--- 32,42 ----
  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