Feature: Add role column to worker list

From #233 (closed) I thought it would be a good idea to add a column "role" to the worker list so we can filter by role. I understand this info can be accessed using the detailed view of the worker.

mentioned in commit 574315a6

mentioned in merge request !162 (merged)

In branch feature/238_add_role_column_worker_list it looks like this. See merge request !162 (merged)

mentioned in commit 9f44db56

mentioned in commit 08ddf342

mentioned in commit 1121aa01

closed

changed milestone to %0.12.0

changed milestone to %0.12.0