8176448: [macos] Popups in JCombobox and Choice have incorrect location in multiscreen systems
Reviewed-by: alexsch, azvegint

8160974: [TESTBUG] Mark more headful tests with @key headful.
Reviewed-by: serb, simonis

8144161: [TESTBUG] [macosx] Test javax/swing/plaf/basic/BasicComboPopup/7072653/bug7072653.java fails for mac
Reviewed-by: rchamyal, alexsch

7072653: JComboBox popup mispositioned if its height exceeds the screen height
Reviewed-by: alexsch, azvegint