Find references within a scene on a right click context menu for components. As per this tweet https://twitter.com/KarlJamesJones/status/1026756113218371586 Note: Only tested with 2017.4.6

FindSceneRefs.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEditor;
using System.Reflection;
using System;

public class FindSceneRefs {

    [MenuItem("CONTEXT/Component/Find References In Scene")]
    private static void OnSearchForReferencesToComponent(MenuCommand command)
    {
        Type searchableEditorWindowType = typeof(SearchableEditorWindow);
        FieldInfo hierarhcyType = searchableEditorWindowType.GetField("m_HierarchyType", BindingFlags.Instance | BindingFlags.NonPublic);
        FieldInfo hasSearchFilterFocus = searchableEditorWindowType.GetField("m_HasSearchFilterFocus", BindingFlags.Instance | BindingFlags.NonPublic);
        FieldInfo searchFilterField = searchableEditorWindowType.GetField("m_SearchFilter", BindingFlags.Instance | BindingFlags.NonPublic);

        Type editorApplicationType = typeof(EditorApplication);
        MethodInfo CallSearchHasChanged = editorApplicationType.GetMethod("Internal_CallSearchHasChanged", BindingFlags.NonPublic | BindingFlags.Static);
        var component = command.context as Component;
        SearchableEditorWindow[] searchableWindows = Resources.FindObjectsOfTypeAll<SearchableEditorWindow>();
        if (component)
        {
            var searchFilter = "ref:" + component.GetInstanceID() + ":";
            foreach (SearchableEditorWindow sw in searchableWindows)
            {
                if ((HierarchyType)hierarhcyType.GetValue(sw) == HierarchyType.GameObjects)
                {
                    searchFilterField.SetValue(sw, searchFilter);
                    CallSearchHasChanged.Invoke(null, new object[0]);
                    hasSearchFilterFocus.SetValue(sw,true);
                    sw.Repaint();
                }
            }
        }
    }
}