Improve fixed width/height/size hit testing

Zhao Yuhang

2024-05-23 6002cd46a2c5a1c2c4afdbf8e491e76f68b9bfd8

 examples/mainwindow/mainwindow.qrc

@@ -1,5 +1,6 @@
<RCC>
    <qresource prefix="/">
        <file>dark-style.qss</file>
        <file>light-style.qss</file>
    </qresource>
</RCC>