Use CommonControlsColors for PromptTextBox/SecurePasswordBox

Use standard Visual Studio colors for text boxes.

Author: jcansdale

src/GitHub.VisualStudio.UI/Styles/TextBlocks.xaml

@@ -1,14 +1,13 @@
 <ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                     xmlns:ui="clr-namespace:GitHub.UI;assembly=GitHub.UI"
-                    xmlns:vs="clr-namespace:Microsoft.VisualStudio.PlatformUI;assembly=Microsoft.VisualStudio.Shell.14.0" 
-                    xmlns:local="clr-namespace:GitHub.VisualStudio.Styles"
-                    xmlns:vsui="clr-namespace:GitHub.VisualStudio.UI">
+                    xmlns:vs="clr-namespace:Microsoft.VisualStudio.PlatformUI;assembly=Microsoft.VisualStudio.Shell.14.0"
+                    xmlns:shell="clr-namespace:Microsoft.VisualStudio.Shell;assembly=Microsoft.VisualStudio.Shell.14.0">
 
     <Style x:Key="GitHubVsPromptTextBox" TargetType="{x:Type ui:PromptTextBox}">
-        <Setter Property="Background" Value="{DynamicResource GitHubVsBrandedUIBackground}"/>
-        <Setter Property="Foreground" Value="{DynamicResource GitHubVsToolWindowText}"/>
-        <Setter Property="BorderBrush" Value="{DynamicResource GitHubVsBrandedUIBorder}"/>
+        <Setter Property="Background" Value="{DynamicResource {x:Static vs:CommonControlsColors.TextBoxBackgroundBrushKey}}"/>
+        <Setter Property="Foreground" Value="{DynamicResource {x:Static vs:CommonControlsColors.TextBoxTextBrushKey}}"/>
+        <Setter Property="BorderBrush" Value="{DynamicResource {x:Static vs:CommonControlsColors.TextBoxBorderBrushKey}}"/>
         <Setter Property="KeyboardNavigation.TabNavigation" Value="None"/>
         <Setter Property="HorizontalContentAlignment" Value="Left"/>
         <Setter Property="FocusVisualStyle" Value="{x:Null}"/>
@@ -31,7 +30,7 @@
                         <Grid>
                             <ScrollViewer x:Name="PART_ContentHost" Padding="{TemplateBinding Padding}" Focusable="false" HorizontalScrollBarVisibility="Hidden" VerticalScrollBarVisibility="Hidden" VerticalAlignment="Top" Margin="0"/>
                             <Label x:Name="PromptLabel" HorizontalAlignment="Left"
-                                 Foreground="{DynamicResource GitHubVsGrayText}"
+                                 Foreground="{DynamicResource {x:Static shell:VsBrushes.GrayTextKey}}"
                                  FontSize="{TemplateBinding FontSize}" Padding="{TemplateBinding Padding}" Opacity="0"
                                  Target="{Binding ElementName=Bd}"
                                  SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" Focusable="False" IsHitTestVisible="False"