Support partial retrieval of possible values

[blcham]

Possible values should be loaded only when it is needed, i.e. when a user opened a section that contains possible values. Currently, all the values are retrieved which completely froze the browser in some scenarios.

This is a form where it completely froze (see storybook):
#173

Note, in the storybook, it does not freeze because it actually does not pose a GET request. In a real application, each possible value query creates a GET request.

[blcham]

Related resources:
https://developer.chrome.com/docs/devtools/evaluate-performance/?utm_source=devtools
https://developer.mozilla.org/en-US/docs/Web/API/Window/requestIdleCallback