Extra spacer in QAT

<ribbon:RibbonWindow
    x:Class="RibbonColorExample.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:ribbon="http://schemas.actiprosoftware.com/winfx/xaml/ribbon"
    xmlns:themes="http://schemas.actiprosoftware.com/winfx/xaml/themes"
    Title="Actipro Ribbon Color Example"
    Height="300"
    Width="400"
    Icon="pack://application:,,,/RibbonColorExample;component/Icons/A.png"
    >
    
    <Grid>
        <ribbon:Ribbon>
            <ribbon:Ribbon.QuickAccessToolBarItems>
                <ribbon:Button Id="A" Command="ApplicationCommands.Save" Label="Save" ImageSourceSmall="pack://application:,,,/RibbonColorExample;component/Icons/X.png"/>
                <ribbon:Button Id="B" Command="ApplicationCommands.Save" Label="Save" ImageSourceSmall="pack://application:,,,/RibbonColorExample;component/Icons/Y.png"/>
                <ribbon:Button Id="C" Command="ApplicationCommands.Save" Label="Save" ImageSourceSmall="pack://application:,,,/RibbonColorExample;component/Icons/Z.png"/>
            </ribbon:Ribbon.QuickAccessToolBarItems>
        </ribbon:Ribbon>
    </Grid>
</ribbon:RibbonWindow>