fix(client): A removed activity now doesn't show up the lanes anymore
fix(client): A removed activity now doesn't show up the lanes anymore

When an activity was removed, it was shown striketrough on the activity view in board-mode. This
commit fixes this error and hides this activity

1305

part-up/part-up,part-up/part-up,part-up/part-up,part-up/part-up