fix(search): remove background with mouseEvent (#775)

* fix(search): remove background with mouseEvent

make sure when mouseenter we remove all existing background

Signed-off-by: Aaron <29749331+aarnphm@users.noreply.github.com>

* chore: update logics from suggestions

Co-authored-by: Jacky Zhao <j.zhao2k19@gmail.com>

* revert: class is evicted

* fix: address correct type

Signed-off-by: Aaron <29749331+aarnphm@users.noreply.github.com>

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Signed-off-by: Aaron <29749331+aarnphm@users.noreply.github.com>
Co-authored-by: Jacky Zhao <j.zhao2k19@gmail.com>