hg: jdk10/client/jdk: 8182031: Swing's ComboBox Popup opens and closes immediately

[prasanta.sadhukhan at oracle.com]

Changeset: 17d2d44e306c
Author:    psadhukhan
Date:      2017-06-16 11:07 +0530
URL:       http://hg.openjdk.java.net/jdk10/client/jdk/rev/17d2d44e306c

8182031: Swing's ComboBox Popup opens and closes immediately
Reviewed-by: azvegint

! src/java.desktop/share/classes/javax/swing/plaf/basic/BasicComboPopup.java
+ test/javax/swing/JComboBox/8182031/ComboPopupTest.java