On Ubuntu 13.04 with Unity it would be very useful to add a tray icon (panel applet) like the icon in the window taskbar.
At the moment I can not find a way to do so in Ubuntu with Rainlendar Version 2.11.1 (b129) 64 bit (currently newest version).
Another way would be to add a Rainlendar icon to the launcher of Unity (default: on the left side). The icon should allow to show the desktop calendar, todo and event list on top of all other window until someone clicks outside of the Rainlendar windows (calendar, todo list...).
What is possible at the moment?
You can lock the Rainlendar icon to Unity's launcher, if you have opened Rainlendar's options in example. But every time you click on the icon, a message appears, which asks you:
"Do you want to start another instance? Rainlendar seems to be already running. You can start another instance by selecting 'Yes'. If this is not the case and this question pops up every time you start Rainlendar please remove this file: /tmp/Rainlendar2-...."
I hope you understand that it would very nice to have an app icon feature to quick access the calendar, event list etc. if you have got a lot of different windows opened.
Please let me know if something isn't clear to you or if I can help somehow.