Improve fixed width/height/size hit testing

Zhao Yuhang

2024-05-23 6002cd46a2c5a1c2c4afdbf8e491e76f68b9bfd8

 examples/mainwindow/light-style.qss

@@ -140,12 +140,12 @@

/* Window */

MainWindow[custom-style=true] {
    background-color: transparent;
MainWindow {
    background-color: #F3F3F3;
}

MainWindow[custom-style=false] {
    background-color: #F3F3F3;
MainWindow[custom-style=true] {
    background-color: transparent;
}

QWidget#clock-widget {