[Bug]: canSeeToken is flaky in some situations

[bubblobill]

Describe the Bug

canSeeToken() often returns an empty array for a token that can be seen.
This is often the case with large tokens seen through narrow gaps where the vertices checked are not in the visible area.

To Reproduce

1. Place two tokens either side of a gap, make one of them big. See screenshot.
2. Call canSeeToken(y) on token x.
3. It is possible to position the tokens to return a false negative.

Expected Behaviour

return a useful result such as true in place of the list of points.

Screenshots

MapTool Info

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Desktop

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Additional Context

No response