From 5e1ac4ef1e67dadd15777f5f20897c3f112eab7a Mon Sep 17 00:00:00 2001
From: mguessan
Note to Ubuntu 11.10 Oneiric users: Unity does not support system tray defined by FreeDesktop, you will need + to switch to standard Gnome Panel to use DavMail (and any other application using system tray)
+Note to Ubuntu 11.04 users: all tray icons are hidden by default, use the following command to restore normal mode:
+gsettings set com.canonical.Unity.Panel systray-whitelist "['all']"
Prerequisite : Sun J2SE 1.5 or 1.6. Tray icon is now implemented with SWT and compatible with