Providing Overlay for Group task 

what is Done
After a Group task is created 
Only a Single task is listed in the all task list with (Group Task ) having attached with its status
As being the group task this task cannot be updated so no Update button is provided for it
when a user clicks on this listing of group task a overlay pops up showing all the list of tasks assigned to every one 
so this facility is basically provided to see what is the status of all the tasks assigned to different assigness