'Number of issued tasks' and 'number of closed tasks' as needle summable column on generic gauge when needle entity is tasks

Tags: tasks

So far, 'number of issued tasks' and 'number of closed tasks' are not available as needle summable column on generic gauge when needle entity is tasks. With this modification, 'number of issued tasks' and 'number of closed tasks' are available as needle summable column on generic gauge when needle entity is tasks.