Move prop GlobalWin.UserBag to global MovieSession

and weaken to IDict<K, V>

src/BizHawk.Client.Common/movie/MovieSession.cs

@@ -46,6 +46,8 @@ namespace BizHawk.Client.Common
 		public bool NewMovieQueued => _queuedMovie != null;
 		public string QueuedSyncSettings => _queuedMovie.SyncSettingsJson;
 
+		public IDictionary<string, object> UserBag { get; set; } = new Dictionary<string, object>();
+
 		public IInputAdapter MovieIn { private get; set; }
 		public IInputAdapter MovieOut { get; } = new CopyControllerAdapter();
 		public IStickyAdapter StickySource { get; set; }

src/BizHawk.Client.Common/movie/interfaces/IMovieSession.cs

@@ -20,6 +20,8 @@ namespace BizHawk.Client.Common
 		/// </summary>
 		string QueuedSyncSettings { get; }
 
+		IDictionary<string, object> UserBag { get; set; }
+
 		IMovieController MovieController { get; }
 
 		/// <summary>

src/BizHawk.Client.Common/savestates/SavestateFile.cs

@@ -17,9 +17,9 @@ namespace BizHawk.Client.Common
 		private readonly IStatable _statable;
 		private readonly IVideoProvider _videoProvider;
 		private readonly IMovieSession _movieSession;
-		private readonly Dictionary<string, object> _userBag;
+		private readonly IDictionary<string, object> _userBag;
 
-		public SavestateFile(IEmulator emulator, IMovieSession movieSession, Dictionary<string, object> userBag)
+		public SavestateFile(IEmulator emulator, IMovieSession movieSession, IDictionary<string, object> userBag)
 		{
 			if (!emulator.HasSavestates())
 			{

src/BizHawk.Client.EmuHawk/Api/UserDataApi.cs

@@ -13,15 +13,15 @@ namespace BizHawk.Client.EmuHawk
 				var t = value.GetType();
 				if (!t.IsPrimitive && t != typeof(string)) throw new InvalidOperationException("Invalid type for userdata");
 			}
-			GlobalWin.UserBag[name] = value;
+			GlobalWin.MovieSession.UserBag[name] = value;
 		}
 
-		public object Get(string key) => GlobalWin.UserBag.TryGetValue(key, out var value) ? value : null;
+		public object Get(string key) => GlobalWin.MovieSession.UserBag.TryGetValue(key, out var value) ? value : null;
 
-		public void Clear() => GlobalWin.UserBag.Clear();
+		public void Clear() => GlobalWin.MovieSession.UserBag.Clear();
 
-		public bool Remove(string key) => GlobalWin.UserBag.Remove(key);
+		public bool Remove(string key) => GlobalWin.MovieSession.UserBag.Remove(key);
 
-		public bool ContainsKey(string key) => GlobalWin.UserBag.ContainsKey(key);
+		public bool ContainsKey(string key) => GlobalWin.MovieSession.UserBag.ContainsKey(key);
 	}
 }

src/BizHawk.Client.EmuHawk/GlobalWin.cs

@@ -1,7 +1,6 @@
 using BizHawk.Bizware.BizwareGL;
 using BizHawk.Client.Common;
 using BizHawk.Emulation.Common;
-using System.Collections.Generic;
 
 // ReSharper disable StyleCop.SA1401
 namespace BizHawk.Client.EmuHawk
@@ -22,8 +21,6 @@ namespace BizHawk.Client.EmuHawk
 
 		public static Sound Sound;
 
-		public static Dictionary<string, object> UserBag { get; set; } = new Dictionary<string, object>();
-
 		public static Config Config { get; set; }
 		public static GameInfo Game { get; set; }
 		public static IMovieSession MovieSession { get; set; }

src/BizHawk.Client.EmuHawk/MainForm.cs

@@ -4012,7 +4012,7 @@ namespace BizHawk.Client.EmuHawk
 				return;
 			}
 
-			if (new SavestateFile(Emulator, MovieSession, GlobalWin.UserBag).Load(path))
+			if (new SavestateFile(Emulator, MovieSession, MovieSession.UserBag).Load(path))
 			{
 				OSD.ClearGuiText();
 				EmuClient.OnStateLoaded(this, userFriendlyStateName);
@@ -4091,7 +4091,7 @@ namespace BizHawk.Client.EmuHawk
 
 			try
 			{
-				new SavestateFile(Emulator, MovieSession, GlobalWin.UserBag).Create(path, Config.Savestates);
+				new SavestateFile(Emulator, MovieSession, MovieSession.UserBag).Create(path, Config.Savestates);
 
 				EmuClient.OnStateSaved(this, userFriendlyStateName);