[MD] Datasource management Edit/Update page UX updates (opensearch-project#2629)

Signed-off-by: mpabba3003 <amazonmanideep@gmail.com>
Signed-off-by: Sergey V. Osipov <sipopo@yandex.ru>

Author: mpabba3003

CHANGELOG.md

@@ -32,6 +32,7 @@ Inspired from [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 * [Vis Builder] Update vislib params and misc fixes ([2610](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/2610))
 * [MD] Add data source param to low-level search call in Discover ([#2431](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/2431))
 * [Multi DataSource] Skip data source view in index pattern step when pick default ([#2574](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/2574))
+* [Multi DataSource] Address UX comments on Edit Data source page ([#2629](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/2629))
 
 ### 🚞 Infrastructure