Expose detectCollisions property in Rigidbody component

RigidbodyInspector.cs

using UnityEngine;
using UnityEditor;

[CustomEditor(typeof(Rigidbody))]
public class RigidBodyInspector : Editor
{
    public override void OnInspectorGUI()
    {
        Rigidbody target = (Rigidbody)this.target;
        if (DrawDefaultInspector())
        {
            
        }
        target.detectCollisions = EditorGUILayout.Toggle("Detect Collisions", target.detectCollisions);
    }
}