sync: from linuxdeepin/dtkcore

[deepin-ci-robot]

Synchronize source files from linuxdeepin/dtkcore.

Source-pull-request: linuxdeepin/dtkcore#469

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关键摘要:

• config->moveToThread(DConfig::globalThread()); 可能会导致线程安全问题，需要确认 DConfig::globalThread() 是否是全局线程，并且确保所有相关的信号槽连接都在同一个线程中。
• 使用 lambda 表达式连接信号和槽时，捕获 this 可能会导致内存泄漏，如果 owner 是一个局部变量，那么在 lambda 表达式执行完毕后，owner 可能会被销毁，导致访问空指针。

是否建议立即修改:

• 是