Add the ability to set or not docked mode via config file (#227)

* Add a toggleable DockedMode bool

Ryujinx.HLE/OsHle/SystemStateMgr.cs

@@ -36,6 +36,8 @@ namespace Ryujinx.HLE.OsHle
         internal long DesiredLanguageCode { get; private set; }
 
         internal string ActiveAudioOutput { get; private set; }
+        
+        public bool DockedMode { get; set; }
 
         public SystemStateMgr()
         {
@@ -82,4 +84,4 @@ namespace Ryujinx.HLE.OsHle
             return Code;
         }
     }
-}
+}