Select draft text when shown.

Author: grokys

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

@@ -154,6 +154,7 @@
                               TextWrapping="Wrap"
                               VerticalAlignment="Center"
                               GotFocus="ReplyPlaceholder_GotFocus"
+                              Loaded="body_Loaded"
                               SpellCheck.IsEnabled="True">
                 <ui:PromptTextBox.Style>
                     <Style TargetType="ui:PromptTextBox" BasedOn="{StaticResource RoundedPromptTextBox}">

src/GitHub.VisualStudio.UI/Views/CommentView.xaml.cs

@@ -70,5 +70,11 @@ void OpenHyperlink(object sender, ExecutedRoutedEventArgs e)
                 GetBrowser().OpenUrl(uri);
             }
         }
+
+        private void body_Loaded(object sender, System.Windows.RoutedEventArgs e)
+        {
+            var textBox = (PromptTextBox)sender;
+            textBox.SelectAll();
+        }
     }
 }