fix(theme): fix highlight effect when operating with keyboard (#1364)

[asyncguo]

Summary

fix the problem that when switching the search data up and down by the keyboard's arrow keys, the highlighting effect conflicts with the mouse hover effect, and the highlighted elements are messed up.

closes: #1364

Related Issue

Checklist

• Tests updated (or not required).
• Documentation updated (or not required).

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[Timeless0911]

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