Re-enable VT mode on Windows after running command in ConsoleHost (#14413)

src/Microsoft.PowerShell.ConsoleHost/host/msh/ConsoleHost.cs

@@ -2430,6 +2430,14 @@ namespace Microsoft.PowerShell
 
                 while (!_parent.ShouldEndSession && !_shouldExit)
                 {
+#if !UNIX
+                    if (ui.SupportsVirtualTerminal)
+                    {
+                        // need to re-enable VT mode if it was previously enabled as native commands may have turned it off
+                        ui.TryTurnOnVtMode();
+                    }
+#endif
+
                     try
                     {
                         _parent._isRunningPromptLoop = true;

src/Microsoft.PowerShell.ConsoleHost/host/msh/ConsoleHostUserInterface.cs

@@ -60,9 +60,14 @@ namespace Microsoft.PowerShell
 
             _parent = parent;
             _rawui = new ConsoleHostRawUserInterface(this);
+            SupportsVirtualTerminal = TryTurnOnVtMode();
+            _isInteractiveTestToolListening = false;
+        }
 
+        internal bool TryTurnOnVtMode()
+        {
 #if UNIX
-            SupportsVirtualTerminal = true;
+            return true;
 #else
             try
             {
@@ -76,15 +81,16 @@ namespace Microsoft.PowerShell
                     // We only know if vt100 is supported if the previous call actually set the new flag, older
                     // systems ignore the setting.
                     m = ConsoleControl.GetMode(handle);
-                    this.SupportsVirtualTerminal = (m & ConsoleControl.ConsoleModes.VirtualTerminal) != 0;
+                    return (m & ConsoleControl.ConsoleModes.VirtualTerminal) != 0;
                 }
             }
             catch
             {
+                // Do nothing if failed
             }
-#endif
 
-            _isInteractiveTestToolListening = false;
+            return false;
+#endif
         }
 
         /// <summary>