Octicon timeline theming

Author: donokuda

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

@@ -66,4 +66,6 @@
   <SolidColorBrush x:Key="GitHubPendingReviewBackground" Color="#FFF8C7" />
   <SolidColorBrush x:Key="GitHubMultilineListItemActiveBrush" Color="#FFCCCEDB" />
   <SolidColorBrush x:Key="GitHubFileExpanderHeaderBackgroundBrush" Color="#FFD6DBE9" />
+
+    <SolidColorBrush x:Key="GitHubTimelineEventBackgroundBrush" Color="#FFe1e4e8" />
 </ResourceDictionary>

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

@@ -66,4 +66,6 @@
   <SolidColorBrush x:Key="GitHubPendingReviewBackground" Color="#26384D" />
   <SolidColorBrush x:Key="GitHubMultilineListItemActiveBrush" Color="#FF3F3F46"/>
   <SolidColorBrush x:Key="GitHubFileExpanderHeaderBackgroundBrush" Color="#FF2D2D30" />
+
+    <SolidColorBrush x:Key="GitHubTimelineEventBackgroundBrush" Color="#FF4b4d50" />
 </ResourceDictionary>

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

@@ -66,4 +66,6 @@
   <SolidColorBrush x:Key="GitHubPendingReviewBackground" Color="#FFF8C7" />
   <SolidColorBrush x:Key="GitHubMultilineListItemActiveBrush" Color="#FFCCCEDB"/>
   <SolidColorBrush x:Key="GitHubFileExpanderHeaderBackgroundBrush" Color="#FFEEEEF2" />
+
+    <SolidColorBrush x:Key="GitHubTimelineEventBackgroundBrush" Color="#FFe1e4e8" />
 </ResourceDictionary>

src/GitHub.VisualStudio.UI/Views/Documents/CommitListView.xaml

@@ -31,7 +31,7 @@
                         Grid.Column="0">
                     <Ellipse Height="28"
                              Width="28"
-                             Fill="#e1e4e8" /> 
+                             Fill="{DynamicResource GitHubTimelineEventBackgroundBrush}" /> 
 
                     <ghfvs:OcticonImage DockPanel.Dock="Left"
                                     Foreground="{DynamicResource VsBrush.WindowText}"