Minor issues when saving file #231

When saving the file, the status of the file does not change and stays as unsaved. For example, when closing the file, it tells you that there remain changes without being saved even though the file was saved a moment ago. Also, it is not possible to simply save the file as it is. The only option is to "save as", opening the display to choose a folder where to save the "new" file or replace and older one, limiting the application from a quick saving option.