Fix autocomplete many input

[gaspergrom]

Changes proposed ✍️

What

🤖 Generated by Copilot at 02a2124

Improved performance and user experience of the autocomplete-many-input component by changing the lifecycle hook and the promise handling.
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🤖 Generated by Copilot at 02a2124

mounted hook fetches
results without blocking view
a swift autumn breeze

Why

How

🤖 Generated by Copilot at 02a2124

• Improve performance and user experience of autocomplete component by fetching results after mounting instead of before rendering (link)

Checklist ✅

• Label appropriately with Feature, Improvement, or Bug.
• Add screehshots to the PR description for relevant FE changes
• New backend functionality has been unit-tested.
• API documentation has been updated (if necessary) (see docs on API documentation).
• Quality standards are met.