plotmatrix axes alignment and QwtPlotZoomer

[HeyYO]

I'm trying to adapt axes alignment code from the PlotMatrix playground example to my application. But It doesn't work as I expect when I add QwtPlotZoomer to the plots.

Problem is when I zoom into a plot with rectangle selection other plots axes aren't updated immediately. And Y axes stay out of alignment. But they are correctly updated when I resize the window.How can I correctly trigger an update on axis widgets?

Problem can be reproduced by adding a QwtPlotZoomer to `Plot` class in plotmatrix playground example. Code:

public:
    QwtPlotZoomer* zoomer;
    Plot( QWidget *parent = NULL ):
        QwtPlot( parent )
    {
        QwtPlotCanvas *canvas = new QwtPlotCanvas();
        canvas->setLineWidth( 1 );
        canvas->setFrameStyle( QFrame::Box | QFrame::Plain );
 
        setCanvas( canvas );
 
        zoomer = new QwtPlotZoomer(canvas);
    }

public:
    QwtPlotZoomer* zoomer;
    Plot( QWidget *parent = NULL ):
        QwtPlot( parent )
    {
        QwtPlotCanvas *canvas = new QwtPlotCanvas();
        canvas->setLineWidth( 1 );
        canvas->setFrameStyle( QFrame::Box | QFrame::Plain );

        setCanvas( canvas );

        zoomer = new QwtPlotZoomer(canvas);
    }

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