No visible tray icon in gnome-shell

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In the GNOME 3 gnome-shell currently the YajHFC tray icon is not displayed. This can lead to YajHFC "disappearing" when you close or minimize the main window.

The reason is a bug in current Java implementations, see https://bugzilla.redhat.com/show_bug.cgi?id=683768 for details.

Until this is fixed in newer Java versions, currently the only known "workaround" is to disable the tray icon in YajHFC (uncheck the Display Tray icon option under OptionsGeneral).