How can I remove all navigationpolygons in tileseteditor?

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:bust_in_silhouette: Asked By LordSyd

I have a problem regarding removing a navigationpolygon that I had previously added to an autotile region. No matter where I click, the navpolygon does not get selected (turn light blue). Clicking into the polygon, clicking on the edge of the polygon - nothing works… Is there a shortcut to remove all previously drawn polygons that I do not know of?

If not maybe I will raise an issue in in the github repository, this funcionality either is sorely missing or is buried so deep that it cannot be found.

Thanks for any help!
this ia a screenshot to show what I mean. The big rectangle on the upper left is one navpolygon.