Fix cancellation

Author: rjmholt

src/PowerShellEditorServices/Services/PowerShell/Execution/PipelineThreadExecutor.cs

@@ -113,7 +113,7 @@ private void Run()
             // We need to override the idle handler here,
             // since readline will be overridden when the initial Powershell runspace is instantiated above
             _readLineProvider.ReadLine.TryOverrideIdleHandler(OnPowerShellIdle);
-            _psesHost.PushNewReplTask();
+            _psesHost.StartRepl();
             RunTopLevelConsumerLoop();
         }
 

src/PowerShellEditorServices/Services/PowerShell/Host/EditorServicesConsolePSHost.cs

@@ -153,6 +153,11 @@ internal void CancelCurrentPrompt()
             _consoleReplRunner?.CancelCurrentPrompt();
         }
 
+        internal void StartRepl()
+        {
+            _consoleReplRunner?.StartRepl();
+        }
+
         internal void PushNewReplTask()
         {
             _consoleReplRunner?.PushNewReplTask();