Web console: split the Ingestion view into two views: Supervisors and Tasks

[vogievetsky]

This PR implements the will of the people (I took a poll in the Slack channel and people voted overwhelmingly to split the views).

What has been one view with two tables in it is now two views. This makes a lot of sense considering not all tasks are "Ingestion" tasks.

This PR also:

• Adds a column to the supervisors view to see how many tasks that supervisor has running, clicking on it goes to the task view.
• Makes filters in tables stateful in the URL so that links can be easily shared.
• Makes some adjustments to how adding tiered replicants works in the load rules dialog.
• Does minor code cleanup.

[clintropolis]

🤘