First commit for private source control. Older commits available on Github.

Assets/Plugins/SerializedCollections/Editor/Scripts/Settings/EditorUserSettings.cs

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+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+using UnityEditor;
+using System.IO;
+using System;
+
+namespace AYellowpaper.SerializedCollections.Editor
+{
+    public sealed class EditorUserSettings : ScriptableObject
+    {
+        [SerializeField]
+        private bool _alwaysShowSearch = false;
+        [SerializeField, Range(1, 10)]
+        private int _pageCountForSearch = 1;
+        [SerializeField, Min(1)]
+        private int _elementsPerPage = 10;
+
+        public bool AlwaysShowSearch => _alwaysShowSearch;
+        public int PageCountForSearch => _pageCountForSearch;
+        public int ElementsPerPage => _elementsPerPage;
+
+        private static EditorUserSettings _instance;
+
+        private const string _filePath = "UserSettings/SerializedCollectionsEditorSettings.asset";
+
+        public static EditorUserSettings Get()
+        {
+            if (_instance == null)
+            {
+                _instance = CreateInstance<EditorUserSettings>();
+                LoadInto(_instance);
+            }
+            return _instance;
+        }
+
+        private static void LoadInto(EditorUserSettings settings)
+        {
+            if (!File.Exists(_filePath)) return;
+
+            try
+            {
+                string json = File.ReadAllText(_filePath);
+                EditorJsonUtility.FromJsonOverwrite(json, settings);
+                return;
+            }
+            catch (Exception e)
+            {
+                Debug.LogError(e);
+                return;
+            }
+        }
+
+        internal static void Save()
+        {
+            string contents = EditorJsonUtility.ToJson(Get());
+            File.WriteAllText(_filePath, contents);
+        }
+    }
+}