Add search/filtering for pipeline id or plot name

[veprbl]

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.

[torrijeske]

do you want the search bar in the dropdown (imagine like you start typing in 106 and the bar can auto-populate available options) or just a general search bar?

[veprbl]

Not a dropdown, as we'd like to select multiple options. Just a search field. It would probably either scroll to the first matching item or reduce the list to a matching subset (is it possible to preserve selections of unmatched items in that case?).

[veprbl]

Alphabetic sorting pretty much resolved that issue for me. We can consider this to now be low-priority, I suppose.