Display labels for jobs and further instructions in the Workflows view

Current Situation

• The JOC Cockpit displays a job's position in the workflow.
• The information about the position is intended for machine reading, it is hard to read for users.

Desired Behavior

• Users would like to find labels for jobs in addition to display of the job's position in the JOC Cockpit GUI.
• The motivation being that
  • a label can be more "speaking" as it is specified by the user when designing the workflow.
  • the same job can occur any number of times in a workflow using different labels.

Delimitation

• The feature is not limited to use of labels with jobs.
• As a first step with release 2.5.2 users can add labels to any instructions.
• With the assigned release labels will become visible with the Workflows view.
• With a later release
  • labels will become visible with the Orders Overview view too.
  • labels for any workflow instructions will become visible.