Back button in waypoint selection screen

🚧 THIS IS A TICKET MIGRATED FROM UPVOTY. The original ticket and comments will be available for a limited time over at:
https://abrp.upvoty.com/b/request-a-feature/back-button-in-waypoint-selection-screen/
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Please can we have a back / cancel button on the waypoint selection screen.

Currently, the only way to exit this screen is to confirm a selection.