fix(pro:search): unconfirmed item sequence should change when update

[sallerli1]

PR Checklist

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• The commit message follows our guidelines
• Tests for the changes have been added/updated or not needed
• Docs and demo have been added/updated or not needed

What is the current behavior?

新创建但未确认的搜索项，在其他搜索项被修改之后，顺序会发生变化，导致操作不友好

What is the new behavior?

修复以上问题

Other information

每次在值更新后初始化时，会用两个指针分别遍历已经确认的搜索值和未确认的搜索值，根据更新前记录的顺序将连续的未确认的搜索项插入，保证其在原有的位置

受控使用场景的出现频率明显低于这种场景，因此优先保证未确认搜索项的顺序

[idux-bot]

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[codecov]

Codecov Report

Merging #1725 (4eb617b) into main (0b59f73) will not change coverage.
The diff coverage is n/a.

❗ Current head 4eb617b differs from pull request most recent head 9934401. Consider uploading reports for the commit 9934401 to get more accurate results

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