Remove ToolFormBase.Config and use base property

The non-weird init in ToolManager can't pass in the ctor because 1. Config is
written to in Restart as well as Load and 2. it's a base class and that's not
how ctors work and I should know this

src/BizHawk.Client.EmuHawk/FormBase.cs

@@ -12,7 +12,7 @@ namespace BizHawk.Client.EmuHawk
 	{
 		private string? _windowTitleStatic;
 
-		public Config? Config { get; protected set; }
+		public Config? Config { get; set; }
 
 		[DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
 		public override string Text

src/BizHawk.Client.EmuHawk/tools/ToolFormBase.cs

@@ -13,12 +13,6 @@ namespace BizHawk.Client.EmuHawk
 	{
 		public ToolManager Tools { get; set; }
 
-		public new Config Config
-		{
-			get => base.Config;
-			set => base.Config = value; //TODO used once in ToolManager (for init) and twice in dumb ways
-		}
-
 		public InputManager InputManager { get; set; }
 		public IMainFormForTools MainForm { get; set; }