Update status message to be more user friendly (#276)

Not call out "access token" and "DirectLine token", which uses won't know anything about and don't care.

Author: daxian-dbw

shell/agents/Microsoft.Azure.Agent/ChatSession.cs

@@ -78,10 +78,8 @@ internal async Task<string> RefreshAsync(IStatusContext context, bool force, Can
             {
                 try
                 {
-                    context.Status("Refreshing access token ...");
+                    context.Status("Refreshing tokens ...");
                     await _accessToken.CreateOrRenewTokenAsync(cancellationToken);
-
-                    context.Status("Refreshing DirectLine token ...");
                     await _directLineToken.RenewTokenAsync(_httpClient, cancellationToken);
 
                     // Tokens successfully refreshed.
@@ -292,10 +290,8 @@ internal async Task<CopilotResponse> GetChatResponseAsync(string input, IStatusC
 
         try
         {
-            context.Status("Refreshing access token ...");
+            context.Status("Refreshing tokens ...");
             await _accessToken.CreateOrRenewTokenAsync(cancellationToken);
-
-            context.Status("Refreshing DirectLine token ...");
             await _directLineToken.RenewTokenAsync(_httpClient, cancellationToken);
 
             context?.Status("Sending query ...");