The Workrave application often quits unintentional when I right-click on the icon in the windows system/message bar (default on the right side of the bar). This is annoying behaviour. 

I think the cause is: 
In the right-click menu the "Quit" option is very close to the mouse pointer and a tiny move of the mouse can select unintentionally the Quit option. 

Proposed solution: 
Switch the Quit option with the About option in the right-click menu. Now the About option can be selected unintentionally, but this will give clear user feedback (info window) and down not quit the application.