Collapse dialog title when null

ZuneModdingHelper/App.xaml

@@ -3,6 +3,7 @@
              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
              xmlns:local="clr-namespace:ZuneModdingHelper"
              xmlns:sys="clr-namespace:System;assembly=mscorlib"
+             xmlns:ocWCBV="clr-namespace:OwlCore.Wpf.Converters.Bools.Visible;assembly=OwlCore.Wpf"
              StartupUri="AppWindow.xaml">
     <Application.Resources>
         <ResourceDictionary>
@@ -23,6 +24,7 @@
             <FontFamily x:Key="SegoeMDL2">Segoe MDL2 Assets</FontFamily>
 
             <BooleanToVisibilityConverter x:Key="BoolToVis" />
+            <ocWCBV:NotNullToVisibilityConverter x:Key="NotNullToVis" />
 
             <sys:Boolean x:Key="FalseValue">False</sys:Boolean>
             <sys:Boolean x:Key="TrueValue">True</sys:Boolean>

ZuneModdingHelper/Controls/ZuneLightDialog.xaml

@@ -42,7 +42,8 @@
                            VerticalAlignment="Top" HorizontalAlignment="Left"
                            Fill="{StaticResource ZuneHorizontalGradientAlt}"/>
                 <TextBlock Text="{Binding Title}" d:Text="WINDOWS LIVE ID" FontSize="28" Margin="0,-10,0,12"
-                           Foreground="{StaticResource ZuneMediumTextBrush}"/>
+                           Foreground="{StaticResource ZuneMediumTextBrush}"
+                           Visibility="{Binding Title, Converter={StaticResource NotNullToVis}}"/>
 
                 <StackPanel Grid.Row="1" Grid.ColumnSpan="2">
                     <local:SelectableTextBlock Text="{Binding Description}" FontSize="14" TextWrapping="Wrap" Margin="0,0,0,12"