Improving the add new evaluation modal

[bekossy]

Issue #1392

[aakrem]

@bekossy can you format the code please ?

cd agenta-backend
black .

[aakrem]

Thanks for the PR @bekossy it looks cool!
Small adjustments:

1. Let's make the search results updated while we type.
2. If we type in the search input then exit the modal then open it again the word we typed remains there
3. After we type something then we save we see only the previous results in the list of evalutators

[bekossy]

Thanks for the review @aakrem
Could you checkout to my branch and check if you are able to format the code? Thanks!

[aakrem]

@bekossy, I fixed the format.
Now one last thing I have found is that when we close an evaluator modal it doesn't work; when we edit and when we create.

[aakrem]

Looks reaally cool @bekossy thank you for the PR!!