Refactor Gizmo to support self-define control

[yangfengzzz]

now, Gizmo can control size, translation and rotation. Actually, these three is the basic of viewport manipulation. Gizmo can be refactor to control more paremeter like Collider size, waypoint, and event in CSG modelling mode.

Gizmo should consider to split these three, and make the control target can be self-defined.

[yangfengzzz]

I think Gizmo is better to use raycast not framebuffer picker to contol the toggle. Because in some situation, like waypoint, collider, they are not renderer component but only post-draw wireframe. framebuffer picker will limit the usage of gizmo