fix: [UI] scroll bar focus error

[add-uos]

fix: [UI] scroll bar focus error
[UI] When the slider bar does not appear, click on the right edge, the slider focus status will appear.

Log: [UI] fix scroll bar focus error
Bug: https://pms.uniontech.com/bug-view-244167.html

[github-actions]

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[deepin-bot]

TAG Bot

New tag: 0.7.8
DISTRIBUTION: unstable
Suggest: synchronizing this PR through rebase #401

[deepin-ci-robot]

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This pull-request has been approved by: add-uos, pppanghu77

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