The original filter would only populate the contribution list with perfect matches.

Previously, if a core was installed but didn't match the search it wouldn't appear in the results (due to a board being added or the description changed);
the user could then install (not upgrade) the core, triggering a confusing situation.

When moving to arduino-cli backend we should take care of this issue, at least visually (the cli logic would correctly update/downgrade the core)

@per1234 I couldn't find the relevant issues for this fix; I'm quite sure there are a couple 🙂
It would be great you can cross reference them here.

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