feat: add search status label on findbar and replacebar

[Fozei]

desc: 在查找和替换组件上,增加指示当前选中是第几个和总共有多少个查找结果的标签

[deepin-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: Fozei

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[deepin-ci-robot]

Hi @Fozei. Thanks for your PR.

I'm waiting for a linuxdeepin member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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