[AMORO-2982] UI optimization when no available optimizer groups

[tcodehuber]

Why are the changes needed?

Close #2982.

Brief change log

-

How was this patch tested?

• [ ] Add some test cases that check the changes thoroughly including negative and positive cases if possible

• [ ] Add screenshots for manual tests if appropriate

• [ ] Run test locally before making a pull request

Documentation

• Does this pull request introduce a new feature? (yes / no)
• If yes, how is the feature documented? (not applicable / docs / JavaDocs / not documented)

[tcodehuber]