Fix missing search results in coach quiz creation

[marcellamaki]

Summary

Ensures cards display "inSearchMode"

Also adds a condition to the display of the "select from bookmarks" so it only shows up when there are bookmarks (otherwise, quite confusing)

References

Fixes #9520

Reviewer guidance

Does searching within "create quiz" yield results of available exercises?

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Testing checklist

• Contributor has fully tested the PR manually
• If there are any front-end changes, before/after screenshots are included
• Critical user journeys are covered by Gherkin stories
• Critical and brittle code paths are covered by unit tests

PR process

• PR has the correct target branch and milestone
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• If this is an important user-facing change, PR or related issue has a 'changelog' label
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Reviewer checklist

• Automated test coverage is satisfactory
• PR is fully functional
• PR has been tested for accessibility regressions
• External dependency files were updated if necessary (yarn and pip)
• Documentation is updated
• Contributor is in AUTHORS.md

[radinamatic]

Search field is back for quizzes!!! 💯

@marcellamaki I noticed this slight misalignment of the buttons in the bottom bar after searching, let me know if it's better to open a separate issue or it can be fixed here...

[radinamatic]

Search is back, yey! 👍🏽

[rtibbles]

This only changed JS code, and the JS part of the build completed successfully. The Python failure is fixed in the release-v0.15.x branch, so this is safe to merge.