Update directory icon color

Use blue for dark theme and yellow for light themes

Author: donokuda

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

@@ -48,4 +48,6 @@
   <SolidColorBrush x:Key="GitHubComboBoxBorderBrush" Color="#FFCCCEDC" />
 
   <SolidColorBrush x:Key="GitHubTabItemSelectedBorder" Color="#FFD0D7E4" />
+
+  <SolidColorBrush x:Key="GitHubDirectoryIconForeground" Color="#FFF5D367" />
 </ResourceDictionary>

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

@@ -48,4 +48,6 @@
   <SolidColorBrush x:Key="GitHubComboBoxBorderBrush" Color="#FF434346" />
 
   <SolidColorBrush x:Key="GitHubTabItemSelectedBorder" Color="#FF3F3F46" />
+
+  <SolidColorBrush x:Key="GitHubDirectoryIconForeground" Color="#FF87C3FC" />
 </ResourceDictionary>

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

@@ -41,4 +41,5 @@
   <SolidColorBrush x:Key="GitHubVsWindowText" Color="#FF000000" />
   <SolidColorBrush x:Key="GitHubVsBrandedUIBorder" Color="#FF8591A2" />
   <SolidColorBrush x:Key="GitHubVsBrandedUIBackground" Color="#FFFFFFFF" />
+  <SolidColorBrush x:Key="GitHubDirectoryIconForeground" Color="#FFF5D367" />
 </ResourceDictionary>

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

@@ -48,4 +48,6 @@
   <SolidColorBrush x:Key="GitHubComboBoxBorderBrush" Color="#FFCCCEDC" />
 
   <SolidColorBrush x:Key="GitHubTabItemSelectedBorder" Color="#FFCCCEBD" />
+
+  <SolidColorBrush x:Key="GitHubDirectoryIconForeground" Color="#FFF5D367" />
 </ResourceDictionary>

src/GitHub.VisualStudio/UI/Views/PullRequestDetailView.xaml

@@ -424,7 +424,7 @@
                                     <HierarchicalDataTemplate DataType="{x:Type vm:PullRequestDirectoryViewModel}"
                                                           ItemsSource="{Binding Children}">
                                         <StackPanel Orientation="Horizontal">
-                                            <ui:OcticonImage Icon="file_directory" Foreground="{DynamicResource GitHubVsWindowText}"/>
+                                            <ui:OcticonImage Icon="file_directory" Foreground="{DynamicResource GitHubDirectoryIconForeground}" />
                                             <TextBlock Text="{Binding DirectoryName}" Margin="4 2" VerticalAlignment="Center"/>
                                         </StackPanel>
                                     </HierarchicalDataTemplate>