message: qt, android: Add GUIUtil::IsEscapeOrBack helper
diff: @@ -425,6 +425,15 @@ namespace GUIUtil
  */
  void ShowModalDialogAndDeleteOnClose(QDialog* dialog);
  + inline bool IsEscapeOrBack(int key)
  + {
  + if (key == Qt::Key_Escape) return true;
  +#ifdef Q_OS_ANDROID
  + if (key == Qt::Key_Back) return true;
  +#endif // Q_OS_ANDROID
  + return false;
  + }
  +
  } // namespace GUIUtil
  #endif // BITCOIN_QT_GUIUTIL_H
  