Entscheidungsnavi v5.6

In addition to various bug fixes, this release offers a number of convenience features. For example, the currently open project is kept for a while even when the browser is closed, so that an accidental closing of the browser no longer leads to a loss of data. Furthermore, an option to export the project at the end of the project is now also integrated and the guidance of the Entscheidungsnavi has been improved so that users can find their way around better.