Portals - improve STATIC bounds on conversion
Portals - improve STATIC bounds on conversion

Introduces fallback path for geometry types that are not recognised.
Allows STATIC mode for CPUParticles (using expansion margin)
Allows STATIC mode for Particles (using "visibility_aabb")

ex/godot,ex/godot,ex/godot,ex/godot,ex/godot,ex/godot,ex/godot,ex/godot