- Electron version: 1.1.0
- Operating system: N/A

Currently there isn't any way to remove dialog boxes (such as ones created through `dialog.showMessageBox`).  This can be useful in, for example, "Keep Waiting" dialogs.  After the window becomes responsive again it would be great if we could programmatically close the dialog.

shell/common/gin_converters/message_box_converter.cc
#include "shell/common/gin_converters/message_box_converter.h"
#include "gin/dictionary.h"
#include "shell/common/gin_converters/image_converter.h"
#include "shell/common/gin_converters/native_window_converter.h"
namespace gin {
bool Converter<electron::MessageBoxSettings>::FromV8(