Fixes and imporvements

services/webapp/code/rosetta/core_app/api.py

services/webapp/code/rosetta/core_app/computing_managers.py

...de/rosetta/core_app/migrations/0009_auto_20211103_2256.py

services/webapp/code/rosetta/core_app/models.py

...webapp/code/rosetta/core_app/templates/add_container.html

...bapp/code/rosetta/core_app/templates/components/task.html

...s/webapp/code/rosetta/core_app/templates/create_task.html

.../webapp/code/rosetta/core_app/templates/task_connect.html

services/webapp/code/rosetta/core_app/templates/tasks.html

services/webapp/code/rosetta/core_app/views.py