Avoid stopping the debugger when canceling other tasks in a debug session (#1712)

While we need to cancel the debugger if a debugged task is running and
Ctrl-C is issued, we explicitly are not running the debugged task when
we're stopped in a breakpoint. Instead, the user can be running
unrelated tasks and may wish to cancel them without stopping the
debugger.

Author: andyleejordan

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

@@ -870,8 +870,12 @@ private void OnCancelKeyPress(object sender, ConsoleCancelEventArgs args)
             _cancellationContext.CancelCurrentTask();
 
             // If the current task was running under the debugger, we need to synchronize the
-            // cancelation with our debug context (and likely the debug server).
-            StopDebugContext();
+            // cancelation with our debug context (and likely the debug server). Note that if we're
+            // currently stopped in a breakpoint, that means the task is _not_ under the debugger.
+            if (!CurrentRunspace.Runspace.Debugger.InBreakpoint)
+            {
+                StopDebugContext();
+            }
         }
 
         private ConsoleKeyInfo ReadKey(bool intercept)