Refactored the computing type by adding the access mode. Refactored the computing manager classes. Added the "access_mode" field and related sys and user conf in the Computing model.

Added the manager and conf properties to the Computing class. Global computing conf refactoring. Minor fixes.

Removed the new task link in favour of creating new tasks is by hitting the play button on a container.

Added support for searching in the container name and filtering on container type from the container page.