Fix some window UIScale bugs (#5499)

* Fix some window UIScale bugs

* Use CalculateAutoScale()

Robust.Client/Graphics/Clyde/Clyde.Windowing.cs

@@ -343,6 +343,8 @@ namespace Robust.Client.Graphics.Clyde
                 if (isMain)
                     _mainWindow = reg;
 
+                reg.IsVisible = parameters.Visible;
+
                 _windows.Add(reg);
                 _windowHandles.Add(reg.Handle);
 

Robust.Client/UserInterface/Controls/OSWindow.cs

@@ -1,6 +1,5 @@
 using System;
 using System.ComponentModel;
-using System.Numerics;
 using Robust.Client.Graphics;
 using Robust.Client.UserInterface.CustomControls;
 using Robust.Shared.IoC;
@@ -138,6 +137,8 @@ namespace Robust.Client.UserInterface.Controls
             _root = UserInterfaceManager.CreateWindowRoot(ClydeWindow);
             _root.AddChild(this);
 
+            // Resize the window by our UIScale
+            ClydeWindow.Size = new((int)(ClydeWindow.Size.X * UIScale), (int)(ClydeWindow.Size.Y * UIScale));
             return ClydeWindow;
         }
 
@@ -192,7 +193,7 @@ namespace Robust.Client.UserInterface.Controls
 
         private void OnWindowResized(WindowResizedEventArgs obj)
         {
-            SetSize = obj.NewSize;
+            SetSize = obj.NewSize / UIScale;
         }
 
         private void RealClosed()

Robust.Client/UserInterface/UserInterfaceManager.Roots.cs

@@ -2,6 +2,7 @@
 using System.Collections.Generic;
 using Robust.Client.Graphics;
 using Robust.Client.UserInterface.Controls;
+using Robust.Shared;
 using Robust.Shared.Map;
 using Robust.Shared.Utility;
 
@@ -28,10 +29,11 @@ internal sealed partial class UserInterfaceManager
         {
             MouseFilter = Control.MouseFilterMode.Ignore,
             HorizontalAlignment = Control.HAlignment.Stretch,
-            VerticalAlignment = Control.VAlignment.Stretch,
-            UIScaleSet = window.ContentScale.X
+            VerticalAlignment = Control.VAlignment.Stretch
         };
 
+        newRoot.UIScaleSet = CalculateAutoScale(newRoot);
+
         _roots.Add(newRoot);
         _windowsToRoot.Add(window.Id, newRoot);