1. Added WindowBorderPainter for QtWidgets
2. Added WindowBorder for QtQuick (uses WindowBorderPainter internally)
3. Adjust some header includes
4. Limit a Linux workaround to the appropriate Qt versions
Signed-off-by: Yuhang Zhao <2546789017@qq.com>
TODO:
1. Special handling for the close button
2. Move QuickChromePalette class to own files
3. More testing
Signed-off-by: Yuhang Zhao <2546789017@qq.com>