Fixes issue with DevToolsPlugin not showing request headers (#1303)

Co-authored-by: Garry Trinder <garry@trinder365.co.uk>

Author: waldekmastykarz

DevProxy.Plugins/Inspection/DevToolsPlugin.cs

@@ -185,7 +185,8 @@ public override async Task AfterResponseAsync(ProxyResponseArgs e, CancellationT
                         .GroupBy(h => h.Name)
                         .ToDictionary(g => g.Key, g => string.Join(", ", g.Select(h => h.Value))),
                     MimeType = e.Session.HttpClient.Response.ContentType
-                }
+                },
+                HasExtraInfo = true
             }
         };