When inviting a person to an event and accidentally clicking on the email of this person it takes you to the email writing window, but there is no way back.
steps to reproduce:
1. Create event.
2. Go to the tap "participants".
3. Add another person by using their email to the event.
4. Click on the email address.
A window for sending an email opens but there is no "go back" button.
A go back button should appear maybe in the left hand corner. Going on the back button of the browser brings you all he way back to your calendar.