Improve fixed width/height/size hit testing

Zhao Yuhang

2024-05-23 6002cd46a2c5a1c2c4afdbf8e491e76f68b9bfd8

 examples/mainwindow/dark-style.qss

@@ -37,7 +37,7 @@

QWK--WindowBar>QAbstractButton#min-button:hover,
QWK--WindowBar>QAbstractButton#min-button:pressed {
    background-color: rgba(0, 0, 0, 15%);
    background-color: rgba(255, 255, 255, 15%);
}

QWK--WindowBar>QAbstractButton#max-button {
@@ -47,7 +47,7 @@

QWK--WindowBar>QAbstractButton#max-button:hover,
QWK--WindowBar>QAbstractButton#max-button:pressed {
    background-color: rgba(0, 0, 0, 15%);
    background-color: rgba(255, 255, 255, 15%);
}

QWK--WindowBar>QAbstractButton#close-button {