Activity bar - workflow activity

[bgruening]

Part of #17284

Workflow

• if we show here running workflows, we could maybe remove the workflow-run activity
• show favorite workflows, similar to tools
• display (1) to go to the advanced search
• show a “create new workflow” button

Workflow-run (invocations)

• combine with the workflow activity
• What should be displayed on the invocation and workflow activity?
• Can we remove it by default?
• Should we only display an icon when workflows are running?

[mvdbeek]

I don't think combining invocations and workflows makes sense, I don't see when you'd ever need both from a user's perspective.