PowerToys/src/settings-ui/Microsoft.PowerToys.Settings.UI/App.xaml

<xaml:XamlApplication
    x:Class="Microsoft.PowerToys.Settings.UI.App"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:xaml="using:Microsoft.Toolkit.Win32.UI.XamlHost">
    <Application.Resources>
        <ResourceDictionary>
            <ResourceDictionary.MergedDictionaries>
                <XamlControlsResources xmlns="using:Microsoft.UI.Xaml.Controls" ControlsResourcesVersion="Version2" />
                <ResourceDictionary Source="/Controls/KeyVisual/KeyVisual.xaml" />
                <ResourceDictionary Source="/Styles/TextBlock.xaml" />
                <ResourceDictionary Source="/Styles/Button.xaml"/>
                <ResourceDictionary Source="/Themes/Colors.xaml"/>
                <ResourceDictionary Source="/Themes/SettingsExpanderStyles.xaml"/>
            </ResourceDictionary.MergedDictionaries>

            <Thickness x:Key="InfoBarIconMargin">6,16,16,16</Thickness>
            <Thickness x:Key="InfoBarContentRootPadding">16,0,0,0</Thickness>
            <x:Double x:Key="SettingActionControlMinWidth">240</x:Double>

            <Style TargetType="ListViewItem" >
                <Setter Property="Margin" Value="0,0,0,2" />
                <Setter Property="Padding" Value="0,0,0,0" />
                <Setter Property="HorizontalContentAlignment" Value="Stretch" />
            </Style>
        </ResourceDictionary>
    </Application.Resources>
</xaml:XamlApplication>