Merge pull request #96 from github/84-tooltip-for-long-names

Add a tooltip for the repository name validator

Author: shana

src/GitHub.UI.Reactive/Assets/Controls/Validation/ValidationMessage.xaml

@@ -20,7 +20,7 @@
         <Setter Property="Template">
             <Setter.Value>
                 <ControlTemplate TargetType="{x:Type local:ValidationMessage}">
-                    <Grid x:Name="grid" Visibility="Collapsed" Margin="{TemplateBinding Padding}">
+                    <Grid x:Name="grid" Visibility="Collapsed" Margin="{TemplateBinding Padding}" ToolTip="{TemplateBinding Text}">
                         <Grid.ColumnDefinitions>
                             <ColumnDefinition Width="Auto"/>
                             <ColumnDefinition Width="Auto"/>