[Upgrade Assistant] After reindexing a data stream, "Close" button disappears

[tsullivan]

Description

This issue describes user experience problems of inconsistency between different types of reindexing, and a source of user confusion caused by a self-updating UI.

Steps:

• In 7.17.28-SNAPSHOT, run Elasticsearch and Kibana and add some custom data to in index
• Upgrade to 8.0.0
• Upgrade to 8.18.0-SNAPSHOT
• Go to "Stack Management > Upgrade Assistant"
  • Navigate to "Elasticsearch deprecation issues"
  • Select an issue for "Old index with a compatibility version < 8.0"
    • Follow the steps through reindexing the old index
    • Note how during the process and at the end of the process, the side panel does have a "Close" button at the bottom.
    • Note how at the end of the process, the reindexing details are still shown
    • Close the side panel
  • Select an issue for "Old data stream with a compatibility version < 8.0"
    • Follow the steps through reindexing the data stream
    • Note how during the process, the side panel does have a "Close" button at the bottom, but does not at the end of the process.
    • Note how at the end of the process, the contents of the panel self-update. The reindexing details are replaced and are no longer shown

Question:

• Should there even be a "Close" button during a reindexing process?

reindexing-issues.mov

[elasticmachine]

Pinging @elastic/kibana-core (Team:Core)

[elasticmachine]

Pinging @elastic/kibana-management (Team:Kibana Management)

[TinaHeiligers]

Todo: triage behavior of closing the flyout on reindexing status. Ideally, selecting the "close" button shouldn't stop the reindexing process. If it does, ensure it's disabled until reindexing is complete.