QLineEdit: Clear Button isn't properly drawn when enabled after setting text

When setting text on QLineEdit and then enabling clear button: the clear button is not drawn but present, i.e. it offsets the text as shown in qlineedit-bug-1.png (the empty space on the right) and when the area where the button is supposed to be is clicked – the text gets cleared. Also, when hovering above the invisible clear button the cursor doesn't changed as it should, i.e. it remains being Qt::IBeamCursor when it should have changed to Qt::ArrowCursor.

When enabling clear button and then setting text on QLineEdit – everything works as expected: the button gets drawn and cursor changes (qlineedit-bug-2.png).

Example code:

#include <QApplication>
#include <QLineEdit>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);

    QLineEdit line;
    line.setText("Some long long long long text"); // -- (1)
    line.setClearButtonEnabled(true);              // -- (2)
    line.show();

    return a.exec();
}

qlineedit-bug-1.png shows the result of the code as it is, while qlineedit-bug-2.png shows the result with lines of code marked as (1) and (2) being switched.

When fixing this issue be sure to not re-introduce QTBUG-37548.