ComponentSorter

using UnityEditor;
using UnityEditorInternal;
using UnityEngine;

internal sealed class Reorder : EditorWindow {

    [MenuItem("Window/Reorder")]
    private static void Init() {
        GetWindow<Reorder>().Show();
    }

    private GameObject selected;
    private Vector2 scroll;

    private void OnGUI() {

        EditorGUILayout.BeginVertical("HelpBox");
        EditorGUILayout.LabelField("Select Gameobject", EditorStyles.boldLabel);
        selected = (GameObject)EditorGUILayout.ObjectField(selected, typeof(GameObject),true);
        EditorGUILayout.Separator();
        EditorGUILayout.EndVertical();

        scroll = EditorGUILayout.BeginScrollView(scroll, false, false);
        if(selected != null)
            for(int i = 0; i < selectionComponents.Length; i++) {

                EditorGUILayout.BeginHorizontal("HelpBox");

                GUI.enabled = i >= 2;
                if(GUILayout.Button("", "OL Plus", GUILayout.Width(15f)))
                    ComponentUtility.MoveComponentUp(selectionComponents[i]);

                GUI.enabled = i < selectionComponents.Length - 1 && i >= 1;
                if(GUILayout.Button("", "OL Minus", GUILayout.Width(15f)))
                    ComponentUtility.MoveComponentDown(selectionComponents[i]);

                GUI.enabled = true;
                var contend = EditorGUIUtility.ObjectContent(selectionComponents[i], typeof(Component));
                contend.text = selectionComponents[i].GetType().Name;
                EditorGUILayout.LabelField(contend, EditorStyles.boldLabel);

                EditorGUILayout.EndHorizontal();
            }
        EditorGUILayout.EndScrollView();
    }

    private Component[] selectionComponents {
        get {
            return selected.GetComponents<Component>();
        }
    }
}