Fix restartround crash and cleanup ServerStorageComponent (#1340)

Content.Server/GameObjects/Components/Items/Storage/StorableComponent.cs

@@ -0,0 +1,34 @@
+using Robust.Shared.GameObjects;
+using Robust.Shared.Serialization;
+
+namespace Content.Server.GameObjects.Components.Items.Storage
+{
+    [RegisterComponent]
+    public class StorableComponent : Component
+    {
+        public override string Name => "Storable";
+
+        public int ObjectSize = 0;
+
+        public override void ExposeData(ObjectSerializer serializer)
+        {
+            base.ExposeData(serializer);
+
+            serializer.DataField(ref ObjectSize, "Size", 1);
+        }
+    }
+
+    /// <summary>
+    /// Enum for the storage capacity of various containers
+    /// </summary>
+    public enum ReferenceSizes
+    {
+        Wallet = 4,
+        Pocket = 12,
+        Box = 24,
+        Belt = 30,
+        Toolbox = 60,
+        Backpack = 100,
+        NoStoring = 9999
+    }
+}