Capsule height and radius setters can modify each other, rather than
using clamping, to avoid cases where values are not set correctly when
loading a scene (depending on the order of properties).
Inspector undo/redo:
Added the possibility to link properties together in the editor, so
they can be undone together, for cases where a property can modify
another one.
Gizmo undo/redo:
Capsule handles pass both radius and height values so they can be undone
together.