Blender Git Loki

Fix T52329: Boolean with aligned shapes failed

Creating ngons with multiple axis aligned shapes in the middle of a
single face would fail in some cases.

This exposed multiple problems in BM_face_split_edgenet_connect_islands

- Islands needed to be sorted on Y axis when X was aligned.
- Checking edge intersections needed increased endpoint bias.
- BVH epsilon needed to be increased.