For me the white-list 'all' value worked in unity, but didn't in unity 2d. That is because of a bug in the white-list behaviour - https://bugs.launchpad.net/ubuntu/+source/unity-2d/+bug/847525. The whitelist -entry 'ALL' doesn't work in unity 2d.
As I white-listed Twinkle by its own (Desktop - Unity - Panel- systray-whitelist: ['JavaEmbeddedFrame', 'Wine', 'scp-dbus-service', 'Update-notifier', 'Twinkle'] it worked for me.
For me the white-list 'all' value worked in unity, but didn't in unity 2d. That is because of a bug in the white-list behaviour - https:/ /bugs.launchpad .net/ubuntu/ +source/ unity-2d/ +bug/847525. The whitelist -entry 'ALL' doesn't work in unity 2d.
As I white-listed Twinkle by its own (Desktop - Unity - Panel- systray-whitelist: ['JavaEmbeddedF rame', 'Wine', 'scp-dbus-service', 'Update-notifier', 'Twinkle'] it worked for me.