Re-organize style sheets and add StyleSpace.

Content.Client/UserInterface/Stylesheets/StylesheetManager.cs

@@ -0,0 +1,26 @@
+using Robust.Client.Interfaces.ResourceManagement;
+using Robust.Client.Interfaces.UserInterface;
+using Robust.Client.UserInterface;
+using Robust.Shared.IoC;
+
+namespace Content.Client.UserInterface.Stylesheets
+{
+    public sealed class StylesheetManager : IStylesheetManager
+    {
+#pragma warning disable 649
+        [Dependency] private readonly IUserInterfaceManager _userInterfaceManager;
+        [Dependency] private readonly IResourceCache _resourceCache;
+#pragma warning restore 649
+
+        public Stylesheet SheetNano { get; private set; }
+        public Stylesheet SheetSpace { get; private set; }
+
+        public void Initialize()
+        {
+            SheetNano = new StyleNano(_resourceCache).Stylesheet;
+            SheetSpace = new StyleSpace(_resourceCache).Stylesheet;
+
+            _userInterfaceManager.Stylesheet = SheetNano;
+        }
+    }
+}