Task listing Changed from card view to list view and few bugs are also resolved in this commit

1. list view is shown instead of card view 
            next to be solved(listing to be done in sordted manner)
2.updation of upload file is resolved
          bug was with the task which do not have the file attached to them when they are created in this case even when some one tries to update the file it was not getting updated properly 
3. email was not sent to the creator of the task ,rectified


issue found and to be resolved.
when some one treis to update a task a fresh new page is load 
the desired behaviour is it should have the previously addded content to the task, to which somone can perform update currently a entirely new fresh window is loaded even if someone tries to update the task