Problem:
After having clicked on the button called "Erstellen" (=create), there is just one button called "Speichern" (=save), but there is a button missing for canceling the creation of a new folder/contact.
So the only way to cancel the process is to use the redo-function of the browser.
This is an issue that can cause uncertainty and confusion, because you don't know directly, how to undo the action.
Solution:
Add a button for "cancel"
[Error prevention]