Feature: Addition of category and subheader to saved-queries API

[cmprmsd]

Feature Description

As seen in PRs like this it should be possible to set the fields category and subheader for ingestion of saved queries via API.

Are you intending to implement this feature?

no

Current Behavior

Only name and query are accepted.

Desired Behavior

POST /api/v2/saved-queries should accept category and subheader as optional fields to further structure the saved queries.

Use Case

Managing a complex set of custom queries.

Misc

I know that this will mess with the structure a bit as currently everything is saved under "Custom Searches".
However I think it is very feasible to make this customizable for power users.