fixes#7346
Path from the current scene isn't added too the argumens anymore by default and needs to be added throug the custom arguments, with $scene. Matches the behaviour of the executable without any arguments.
Custom Arguments are read from editor/main_run_args
(cherry picked from commit abdedc3522)
-Visible 2D and 3D Shapes, Polygons, Tile collisions, etc.
-Visible Navmesh and Navpoly
-Visible collision contacts for 2D and 3D as a red point
-Customizable colors in project settings
