fix: can't move dialog window

[FeiWang1119]

change Control to Item, as Control do not let clicks and touches through to items below them.

Issue: https://github.com/linuxdeepin/dtk/issues/190

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This pull-request has been approved by: 18202781743, FeiWang1119

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关键摘要:

• 在DialogTitleBar.qml中，Item替换为Control可能会影响布局和行为，需要确认是否有特定的设计意图。
• 在DialogTitleBar.qml中，anchors.fill: parent的添加可能会导致子控件的大小超过父控件，需要确保这是预期的行为。
• 在DialogTitleBar.qml中，D.InWindowBlur的直接使用可能会绕过QML的属性绑定，需要确认这是否是预期的用法。
• 在DialogTitleBar.qml中，contentItem的布局属性anchors.fill: parent可能会导致子控件的大小超过父控件，需要确保这是预期的行为。
• 在DialogWindow.qml中，Window替换为Item可能会影响窗口的显示和行为，需要确认是否有特定的设计意图。
• 在DialogWindow.qml中，implicitHeight: childrenRect.height的使用可能会导致窗口高度的计算出现问题，需要确保这是预期的行为。

是否建议立即修改: 是