Add footer templatepart

Author: marcelwgn

Microsoft.Toolkit.Uwp.UI.Controls.Input/TokenizingTextBox/TokenizingTextBox.xaml

@@ -68,6 +68,7 @@
             <Grid.RowDefinitions>
                 <RowDefinition Height="Auto"/>
                 <RowDefinition Height="Auto"/>
+                <RowDefinition Height="Auto"/>
             </Grid.RowDefinitions>
 
             <ContentPresenter Content="{TemplateBinding Header}"
@@ -108,12 +109,17 @@
                           ZoomMode="{TemplateBinding ScrollViewer.ZoomMode}">
 
                 <ItemsPresenter Padding="{TemplateBinding Padding}"
-                                Margin="{StaticResource TokenizingTextBoxPresenterMargin}"
-                                Footer="{TemplateBinding Footer}"
-                                FooterTemplate="{TemplateBinding FooterTemplate}"
-                                FooterTransitions="{TemplateBinding FooterTransitions}" />
+                                Margin="{StaticResource TokenizingTextBoxPresenterMargin}"/>
             </ScrollViewer>
 
+            <ContentPresenter Grid.Row="2"
+                              Content="{TemplateBinding Footer}"
+                              ContentTemplate="{TemplateBinding FooterTemplate}"
+                              Transitions="{TemplateBinding FooterTransitions}"
+                              FontWeight="Normal"
+                              TextWrapping="Wrap"
+                              VerticalAlignment="Top" />
+            
             <VisualStateManager.VisualStateGroups>
                 <VisualStateGroup x:Name="CommonStates">
                     <VisualState x:Name="Disabled">