expose ``GeometryInstance.get_aabb();`` to gdscript
expose ``VisualInstance.get_transformed_aabb();`` to gdscript
and debug ``ImmediateGeometry::add_vertex()``;
(cherry picked from commit c1e2358914)
-=-=-=-=-=-
-fix duplicate function bug when creating script callback in editor
-fix bug where hiding lights does not work
-fix 2D audio listener bug (romulox_x reported)
-fix exported properties with inheritance bug
-fix timer autostart (make it not work on editor)
-reactivate first camara found if viewport runs out of active camera
-option to hide gizmos in viewport
-changed skeleton gizmo because it sucks
-Make convex shapes using CollisionShape visible (use quickhull class)
-fix up menu when editing a mesh, to export collision, navmesh, convex, etc. from it.
-make a menu option to show SRGB in 3D editor views by default
-make option to edit default light direction in viewport settings
-make option to edit default ambient light in viewport settings
-make software conversion of linear->RGB if hardware support not found
-=-=-=-=-=-=-=-=-=-=
-Sprite3D and AnimatedSprite3D support.
-Opaque pre-pass works, is compatible with shadows
-Improved shadow map rendering (can differentiate between plain opaque and opaque with shaders/discard/etc)
-Added option to use alpha discard in FixedMaterial
-Improved Glow FX, many more options (three modes, Additive, Screen and SoftLight), strength and scale
-Ability for Background (image or cubemap) to send to glow buffer
-Dumb Deploy of clients now actually works in Android
-Many Many rendering fixes, 3D is much more usable now.
