Introduced resources to be able to properly resize Checkbox and RadioButton in the Compact density of the Fluent theme. (#19882)

src/Avalonia.Themes.Fluent/Controls/CheckBox.xaml

@@ -13,6 +13,7 @@
   </Design.PreviewWith>
 
   <StreamGeometry x:Key="CheckMarkPathData">M5.5 10.586 1.707 6.793A1 1 0 0 0 .293 8.207l4.5 4.5a1 1 0 0 0 1.414 0l11-11A1 1 0 0 0 15.793.293L5.5 10.586Z</StreamGeometry>
+  <x:Double x:Key="CheckBoxMinHeight">32</x:Double> 
   
   <ControlTheme x:Key="{x:Type CheckBox}" TargetType="CheckBox">
     <Setter Property="Padding" Value="8,0,0,0" />
@@ -21,7 +22,7 @@
     <Setter Property="HorizontalContentAlignment" Value="Left" />
     <Setter Property="VerticalContentAlignment" Value="Center" />
     <Setter Property="CornerRadius" Value="{DynamicResource ControlCornerRadius}" />
-    <Setter Property="MinHeight" Value="32" />
+    <Setter Property="MinHeight" Value="{DynamicResource CheckBoxMinHeight}" />
     <Setter Property="Foreground" Value="{DynamicResource CheckBoxForegroundUnchecked}" />
     <Setter Property="Background" Value="{DynamicResource CheckBoxBackgroundUnchecked}" />
     <Setter Property="BorderBrush" Value="{DynamicResource CheckBoxBorderBrushUnchecked}" />
@@ -35,7 +36,7 @@
                   BorderThickness="{TemplateBinding BorderThickness}"
                   CornerRadius="{TemplateBinding CornerRadius}" />
 
-          <Grid VerticalAlignment="Top" Height="32">
+          <Grid VerticalAlignment="Top" Height="{DynamicResource CheckBoxMinHeight}">
             <Border x:Name="NormalRectangle"
                     BorderBrush="{DynamicResource CheckBoxCheckBackgroundStrokeUnchecked}"
                     Background="{DynamicResource CheckBoxCheckBackgroundFillUnchecked}"

src/Avalonia.Themes.Fluent/Controls/RadioButton.xaml

@@ -11,6 +11,8 @@
     </Border>
   </Design.PreviewWith>
   
+  <x:Double x:Key="RadioButtonMinHeight">32</x:Double>
+  
   <ControlTheme x:Key="{x:Type RadioButton}" TargetType="RadioButton">
     <Setter Property="Background" Value="{DynamicResource RadioButtonBackground}" />
     <Setter Property="Foreground" Value="{DynamicResource RadioButtonForeground}" />
@@ -30,7 +32,7 @@
             BorderThickness="{TemplateBinding BorderThickness}"
             CornerRadius="{TemplateBinding CornerRadius}">
           <Grid ColumnDefinitions="20,*">
-            <Grid Height="32" VerticalAlignment="Top">
+            <Grid Height="{DynamicResource RadioButtonMinHeight}" VerticalAlignment="Top">
 
               <Ellipse
                   Name="OuterEllipse"

src/Avalonia.Themes.Fluent/DensityStyles/Compact.xaml

@@ -21,4 +21,6 @@
   <x:Double x:Key="TabItemMinHeight">28</x:Double>
   <Thickness x:Key="TabItemHeaderMargin">6, 0</Thickness>
   <Thickness x:Key="ButtonPadding">6,4</Thickness>
+  <x:Double x:Key="CheckBoxMinHeight">24</x:Double>
+  <x:Double x:Key="RadioButtonMinHeight">24</x:Double>
 </ResourceDictionary>