Collision Shape 2D 'Disabled' Visualization Correction
Collision Shape 2D 'Disabled' Visualization Correction

Having white or strongly desaturated debug collision shape color
setting would make it harder to visualize enabled / disabled state.
This change makes it easier to visualize enabled / disabled state
by reducing the alpha color by half when disabled.

(cherry picked from commit 0c4594f6c9eb8f50b19bca80b1ca98157543b102)

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