Fix issues with deleting SASL mappings,

I'm still experiencing issues with SASL. Sometimes it shows 16 entries instead of 4 default mappings (each of them is quadrupled). Sometimes it lists them incorrectly, and when deleting just one, deletes three of them. I captured the last one: https://vashirov.fedorapeople.org/share/Screencast_21-12-18_124559.webm

Other issues seems to be fixed.

Fix issues with deleting SASL mappings,

I'm still experiencing issues with SASL. Sometimes it shows 16 entries instead of 4 default mappings (each of them is quadrupled). Sometimes it lists them incorrectly, and when deleting just one, deletes three of them. I captured the last one: https://vashirov.fedorapeople.org/share/Screencast_21-12-18_124559.webm

Ahh, yes, race condition with event listen for when the "instance dropdown" gets updated. This is fixed now. Although I found a new issue where new instances that are created only have two sasl mappings, but that is something completely different.

Other issues seems to be fixed.

LGTM, ack!

389-ds-base is moving from Pagure to Github. This means that new issues and pull requests
will be accepted only in 389-ds-base's github repository.

This pull request has been cloned to Github as issue and is available here:
- https://github.com/389ds/389-ds-base/issues/3164

If you want to continue to work on the PR, please navigate to the github issue,
download the patch from the attachments and file a new pull request.

Thank you for understanding. We apologize for all inconvenience.