Outstanding design issues
How to set the "Veranstaltung", when the user comes directly from a Blog Post for a Veranstaltung without having selected a Veranstaltung first from the list.
Currently, the "Anmelde" page is shown for a moment, because I do not use the page router functionality for redirecting the user to the "Veranstaltungen" Page when neceesary to select a "Veranstaltung".
This could be solved in two ways:
1. Use the Router to always send the user to the "Veranstaltungen" form when no Veranstaltung has been selected
2. Use the Router to set wix.storage with the information from which Blog Post the user is coming.