OpenClipboard fail crashing the OptiKey

[alexandre-mbm]

This fail happened while there was a VNC section. I think handling the exception be solution (and an error notification).

2022-09-07 22:34:59,469 [ 1] INFO  JuliusSweetland.OptiKey.UI.ViewModels.MainViewModel: Copying text from scratchpad to clipboard.
2022-09-07 22:35:00,406 [ 1] ERROR JuliusSweetland.OptiKey.OptiKeyApp: A DispatcherUnhandledException has been encountered...
System.Runtime.InteropServices.COMException (0x800401D0): Falha de OpenClipboard (Exceção de HRESULT: 0x800401D0 (CLIPBRD_E_CANT_OPEN))
   em System.Runtime.InteropServices.Marshal.ThrowExceptionForHRInternal(Int32 errorCode, IntPtr errorInfo)
   em System.Windows.Clipboard.Flush()
   em System.Windows.Clipboard.CriticalSetDataObject(Object data, Boolean copy)
   em System.Windows.Clipboard.SetDataInternal(String format, Object data)
   em System.Windows.Clipboard.SetText(String text, TextDataFormat format)
   em System.Windows.Clipboard.SetText(String text)
   em JuliusSweetland.OptiKey.UI.ViewModels.MainViewModel.<HandleFunctionKeySelectionResult>d__66.MoveNext() na C:\dev\GitHub\OptiKey\src\JuliusSweetland.OptiKey.Core\UI\ViewModels\MainViewModel.ServiceEventHandlers.cs:linha 961
--- Fim do rastreamento de pilha do local anterior onde a exceção foi gerada ---
   em System.Runtime.CompilerServices.AsyncMethodBuilderCore.<>c.<ThrowAsync>b__6_0(Object state)
   em System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
   em System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)

The code around 961 line:

case FunctionKeys.CopyAllFromScratchpad:
    {
        Log.Info("Copying text from scratchpad to clipboard.");
        string textFromScratchpad = KeyboardOutputService.Text;

        if (!string.IsNullOrEmpty(textFromScratchpad))
        {
            Clipboard.SetText(textFromScratchpad);
        }
    }
    break;