Merge more UI refactor stuff (#11277)

* Changelog+options ui controller
* Sandbox UI controller
* Escape menu UI controller

Content.Client/Options/UI/Tabs/GraphicsTab.xaml.cs

@@ -7,9 +7,6 @@ using Robust.Client.UserInterface.Controls;
 using Robust.Client.UserInterface.XAML;
 using Robust.Shared;
 using Robust.Shared.Configuration;
-using Robust.Shared.IoC;
-using Robust.Shared.Localization;
-using Robust.Shared.Maths;
 using Robust.Shared.Prototypes;
 
 namespace Content.Client.Options.UI.Tabs