Worker: missing easy deactivation action
It should be possible to quickly deactivate a number of workers from the configuration, w/o removing all of the configuration from its place. This would allow us to adjust the farm size on demand.
Items to be executed:
- Add a field on each worker indicating its state (active/deactive)
- Add an action to the worker admin to deactivate/activate workers in batch
- Modify the configuration logic so that, if a worker is active, is the same as it not belonging to the configuration
- Display this information adequately on the scheduler/backend page