fix: wrong product icon size in DAboutDialog

[zty199]

when compiled with Qt6, product icon size is set to windowHandle().baseSize()
which is not the same as compiled with Qt5 (fixed size 128x128)

Log: use 128x128 pixmap in DAboutDialog::setProductIcon

[deepin-ci-robot]

Hi @zty199. Thanks for your PR. 😃

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[deepin-bot]

Doc Check bot
🟢 Document Coverage Check Passed!

[deepin-bot]

TAG Bot

New tag: 5.6.31
DISTRIBUTION: unstable
Suggest: synchronizing this PR through rebase #583

[deepin-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: kegechen, zty199

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[deepin-ci-robot]

deepin pr auto review

关键摘要:

• 在代码更改中，将窗口大小从baseSize()更改为QSize(128, 128)可能会导致图标显示不正确，因为原始大小可能与baseSize()不同。需要确认图标是否确实需要调整为128x128像素。
• 注释// TODO: wait for checking表明可能存在未完成的工作，应该确认是否已经完成了所有必要的检查。
• 代码中使用了windowHandle()，但没有检查windowHandle()是否返回了一个有效的窗口句柄。应该添加对windowHandle()返回值的检查，以确保窗口存在且可以访问。

是否建议立即修改:

• 是，需要确保图标大小更改是必要的，并且不会导致图标显示不正确。
• 是，应该立即检查windowHandle()的返回值，以确保窗口可以被正确处理。

[kegechen]

/merge

[deepin-bot]

This pr cannot be merged! (status: blocked)

[kegechen]

/forcemerge

[deepin-bot]

This pr force merged! (status: blocked)