Fix toolbar color difference in electron apps

[otavioschwanck]

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[otavioschwanck]

@deepinzhangshuang @iceleaf916 @leaeasy @shule1987 someone can merge? This problem still persist on deepin 15.8

[zccrs]

Hi, I'm sorry I only replied to you today, can you rebase it, it's a very good, i can merge.

[Decodetalkers]

Ping.. can you continue to view it? @zccrs we can rebase for him

[deepin-ci-robot]

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This pull-request has been approved by: otavioschwanck

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