1. Finish the simple title bar of the QOpenGLWidget demo
2. Minor improvements of the Quick implementation
Signed-off-by: Yuhang Zhao <2546789017@qq.com>
Previously Qt5 can't recognize the Anchor enum, it's fixed now.
Also rename framelesshelper_quick to framelessquickhelper, the
former name was to avoid conflict with an already removed class.
Signed-off-by: Yuhang Zhao <2546789017@qq.com>