[8u40] Review request for RT-38940: [Gtk, Mac] Japanese IME, unable to distinguish focused composing text

[Alexander Zvegintsev]

Hello,

please review the fix
http://cr.openjdk.java.net/~azvegint/fx/8u40/38940/
for
https://javafx-jira.kenai.com/browse/RT-38940

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Thanks,
Alexander.