Add back in the description section

Author: donokuda

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

@@ -197,6 +197,31 @@
                       HorizontalScrollBarVisibility="Auto"
                       VerticalScrollBarVisibility="Auto">
             <ghfvs:ScrollingVerticalStackPanel>
+                <!-- Author and open time -->
+                <ghfvs:SectionControl Name="descriptionSection"
+                                      HeaderText="{x:Static ghfvs:Resources.Description}"
+                                      IsExpanded="True"
+                                      ghfvs:ScrollingVerticalStackPanel.IsFixed="true">
+                    <StackPanel Orientation="Vertical">
+                        <!-- View conversation on GitHub -->
+                        <StackPanel Orientation="Horizontal" Margin="0 4 0 0">
+                            <v:ActorAvatarView ViewModel="{Binding Author}"
+                                               VerticalAlignment="Bottom"
+                                               Width="16"
+                                               Height="16"
+                                               Margin="0,0,0,1"/>
+
+                            <TextBlock VerticalAlignment="Center" Margin="4 0" TextWrapping="Wrap">
+                                <Run FontWeight="SemiBold" Text="{Binding Model.Author.Login, Mode=OneWay}" />
+                                <Run Text="{x:Static ghfvs:Resources.Wrote}" />
+                            </TextBlock>
+                        </StackPanel>
+                        <!-- PR Body -->
+                        <markdig:MarkdownViewer Name="bodyMarkdown"
+                                                Margin="2 4 10 6"
+                                                Markdown="{Binding Body}"/>
+                    </StackPanel>
+                </ghfvs:SectionControl>
 
                 <ghfvs:SectionControl Name="reviewsSection"
                                       HeaderText="{x:Static ghfvs:Resources.Reviewers}"