Worker managed cpu utilization

[Dym03]

This PR adds a option to show utilization with distinguished cpus that are used by running pinned tasks that are assigned to a worker. Without the pinning the feature doesn't work well now.
Currently the change of color scheme is used to distinguish the cpus. But maybe the graying out of the other cpus might be better.

Keybindings added is 'c' that enables the user to toggle between global and worker specific cpu usage.

Features that might be connected with this:

• Add this cpu info into the hq worker info command
• If multiple tasks are runned, there could be a specific mode to filter the running tasks further to show the cpus only for specific task/job
• Update the cpu utilization history, to work with the global / worker specific information

This is part of the feature requested in #1016