Merge pull request #442 from github/fixes/417-icon-dark-theme

Fix github icon on dark theme.

Author: shana

src/GitHub.VisualStudio/Resources/icons/mark_github.xaml

@@ -1,14 +1,18 @@
-<ui:OcticonImage xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
-                 xmlns:cache="clr-namespace:GitHub.VisualStudio.Helpers"
-                 xmlns:ui="clr-namespace:GitHub.UI;assembly=GitHub.UI"
-                 Foreground="{DynamicResource GitHubVsToolWindowText}"
-                 Icon="mark_github">
-  <ui:OcticonImage.Resources>
-    <ResourceDictionary>
-      <ResourceDictionary.MergedDictionaries>
-        <cache:SharedDictionaryManager Source="pack://application:,,,/GitHub.VisualStudio;component/SharedDictionary.xaml" />
-        <cache:SharedDictionaryManager Source="pack://application:,,,/GitHub.UI;component/SharedDictionary.xaml" />
-      </ResourceDictionary.MergedDictionaries>
-    </ResourceDictionary>
-  </ui:OcticonImage.Resources>
-</ui:OcticonImage>
+<Viewbox xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+         Width="1024" Height="1024">
+    <Border BorderBrush="Transparent" BorderThickness="1">
+        <ui:OcticonImage xmlns:cache="clr-namespace:GitHub.VisualStudio.Helpers"
+                     xmlns:ui="clr-namespace:GitHub.UI;assembly=GitHub.UI"
+                     Foreground="{DynamicResource GitHubContextMenuIconBrush}"
+                     Icon="mark_github">
+            <ui:OcticonImage.Resources>
+                <ResourceDictionary>
+                    <ResourceDictionary.MergedDictionaries>
+                        <cache:SharedDictionaryManager Source="pack://application:,,,/GitHub.VisualStudio;component/SharedDictionary.xaml" />
+                        <cache:SharedDictionaryManager Source="pack://application:,,,/GitHub.UI;component/SharedDictionary.xaml" />
+                    </ResourceDictionary.MergedDictionaries>
+                </ResourceDictionary>
+            </ui:OcticonImage.Resources>
+        </ui:OcticonImage>
+    </Border>
+</Viewbox>