gui/gpu: Implement setting and toggle for Aspect Ratio (#1777)

* gui/gpu: Implement setting and toggle for Aspect Ratio

* address gdkchan feedback and add 16:10

* fix config.json file

* Fix rebase

* Address gdkchan feedback

* Address rip feedback

* Fix aspectWidth

Ryujinx.Common/Configuration/ConfigurationFileFormat.cs

@@ -14,7 +14,7 @@ namespace Ryujinx.Configuration
         /// <summary>
         /// The current version of the file format
         /// </summary>
-        public const int CurrentVersion = 17;
+        public const int CurrentVersion = 18;
 
         public int Version { get; set; }
 
@@ -33,6 +33,11 @@ namespace Ryujinx.Configuration
         /// </summary>
         public float MaxAnisotropy { get; set; }
 
+        /// <summary>
+        /// Aspect Ratio applied to the renderer window.
+        /// </summary>
+        public AspectRatio AspectRatio { get; set; }
+
         /// <summary>
         /// Dumps shaders in this local directory
         /// </summary>