Why does Docker show previous task for each service? I want to see only current tasks with the desired state "Running". I want clean up older tasks that have moved to a desired state other than "Running". How can this be achieved?

```
rus@coder:~/Docker$ docker stack ps getstartedlab 
ID                  NAME                         IMAGE                             NODE                DESIRED STATE       CURRENT STATE                     ERROR                              PORTS
gp07knn0g5hl        getstartedlab_redis.1        redis:latest                      myvm1               Ready               Assigned less than a second ago                                      
m31cmdrsoxns         \_ getstartedlab_redis.1    redis:latest                      myvm1               Shutdown            Rejected less than a second ago   "invalid mount config for type…"   
zjxzlx4hd5um         \_ getstartedlab_redis.1    redis:latest                      myvm1               Shutdown            Rejected 39 seconds ago           "invalid mount config for type…"   
zpi3nlsc338g         \_ getstartedlab_redis.1    redis:latest                      myvm1               Shutdown            Rejected 2 minutes ago            "invalid mount config for type…"   
xqpdhsyw54uh        getstartedlab_web.1          motionrus/get-started:part2       myvm1               Running             Running 7 minutes ago                                                
jruvttjnvwn6        getstartedlab_visualizer.1   dockersamples/visualizer:stable   myvm1               Running             Running 7 minutes ago                                                
g0f28ldwvftr        getstartedlab_web.1          motionrus/get-started:part2       myvm1               Shutdown            Failed 8 minutes ago              "No such container: getstarted…"   
zwn1mr6dsafs        getstartedlab_redis.1        redis:latest                      myvm1               Shutdown            Rejected about an hour ago        "invalid mount config for type…"   
zoi4p8rt0lmg         \_ getstartedlab_redis.1    redis:latest                      myvm1               Shutdown            Rejected about an hour ago        "invalid mount config for type…"   
czsb4iu1vx7b        getstartedlab_web.1          motionrus/get-started:part2       myvm2               Shutdown            Shutdown 6 minutes ago                                               
oavyu08f2zpy        getstartedlab_visualizer.1   dockersamples/visualizer:stable   myvm1               Shutdown            Failed 8 minutes ago              "No such container: getstarted…"   
ihisx81pn0jm        getstartedlab_web.2          motionrus/get-started:part2       myvm1               Running             Running 7 minutes ago                                                
8fvkdyyzga5u         \_ getstartedlab_web.2      motionrus/get-started:part2       myvm1               Shutdown            Failed 8 minutes ago              "task: non-zero exit (255)"        
usotwci097ll         \_ getstartedlab_web.2      motionrus/get-started:part2       myvm2               Shutdown            Shutdown 6 minutes ago                                               
js15t9lz0fip        getstartedlab_web.3          motionrus/get-started:part2       myvm1               Running             Running 7 minutes ago                                                
we3brrn188ex         \_ getstartedlab_web.3      motionrus/get-started:part2       myvm1               Shutdown            Failed 8 minutes ago              "task: non-zero exit (255)"        
ed94zf05jnqq        getstartedlab_web.4          motionrus/get-started:part2       myvm1               Running             Running 7 minutes ago                                                
p9ntyj4fl0dw         \_ getstartedlab_web.4      motionrus/get-started:part2       myvm1               Shutdown            Failed 8 minutes ago              "task: non-zero exit (255)"        
ipqdt5h8yb7p         \_ getstartedlab_web.4      motionrus/get-started:part2       myvm2               Shutdown            Shutdown 6 minutes ago                                               
s2vdxejisg0d        getstartedlab_web.5          motionrus/get-started:part2       myvm1               Running             Running 7 minutes ago                                                
yj4l496k8dky         \_ getstartedlab_web.5      motionrus/get-started:part2       myvm1               Shutdown            Failed 8 minutes ago              "task: non-zero exit (255)"        

```

I know, i use grep command, but it isn't best solution

```
rus@coder:~/Docker$ docker stack ps getstartedlab | grep "Running"
xqpdhsyw54uh        getstartedlab_web.1          motionrus/get-started:part2       myvm1               Running             Running 21 minutes ago                                               
jruvttjnvwn6        getstartedlab_visualizer.1   dockersamples/visualizer:stable   myvm1               Running             Running 21 minutes ago                                               
ihisx81pn0jm        getstartedlab_web.2          motionrus/get-started:part2       myvm1               Running             Running 21 minutes ago                                               
js15t9lz0fip        getstartedlab_web.3          motionrus/get-started:part2       myvm1               Running             Running 21 minutes ago                                               
ed94zf05jnqq        getstartedlab_web.4          motionrus/get-started:part2       myvm1               Running             Running 21 minutes ago                                               
s2vdxejisg0d        getstartedlab_web.5          motionrus/get-started:part2       myvm1               Running             Running 21 minutes ago  

```