Sidecar configuration pencil icon edit box doesn't submit a change

When trying to change a Sidecar configuration, and using the pencil edit icon to change the configuration, saving and confirming doesn't seem to actually execute a change.

Video here - no API call sent:

https://github.com/user-attachments/assets/edfef5eb-7c62-43cf-9c36-9c9fd6185d14

Also, confirm box appears under the selection modal, noted here: https://github.com/Graylog2/graylog2-server/issues/23253

* Graylog Version: Graylog 6.3.2+667aca0
* Java Version: embedded
* OpenSearch Version: Data Node 6.3.2
* MongoDB Version: 8.0.6
* Operating System: Debian 12
* Browser version: Arc Version 1.106.0 (66192)

## Checklist
[] This issue fix need to be backported.
[] Does this issue have **security** implications?