Add search/filtering for pipeline id or plot name

**Is your feature request related to a problem? Please describe.**
This was requested by @steinber. It makes sense to have a search functionality.

**Describe the solution you'd like**
Search field above the list could be added.

No files, tests, or entry points are named. Start by locating the list view for pipeline IDs and plot names, then determine how its data is loaded and how filtering should behave; done means a search field above the list filters by either pipeline ID or plot name.

Written by the indexing model from the issue text.