Ensure teleporting ends up on a navmesh, at least check height

[thojmr]

Somehow the Warp tool needs to detect the floor (or navmesh) when warping down declines (Stairs for example). It seems to handle inclines fine. Allow warp tool to land below character root position Y value.

You can compound this once you're airborn for fun.

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[thojmr]

Oh, you also see the following warning when you are airborn "Failed to create agent because it is not close enough to the NavMesh" Not sure if it matters.

[thojmr]

For now use the movement tool + grip to pull yourself back down. Duh!