Steps to reproduce:
1. start tasklist (in develop-profile)
2. login into tasklist (as jonny1)
3. select a task inside the list of tasks -> on the right side the task details are visible
4. mouseover the area left of the "Add groups"-button
--> the area is clickable, the cursor changes into a pointer, and on click the manage groups dialog gets openend.
the area is not clickable