Fix #6752 & Fix #6776 (#6783)

link #6752 
link #6776 

caused by
283f12c9e7 (diff-8f68e6988b089efca72b7954862a47442ec7eb08b37bde5a0c0f072cf4488dd3L9)

src/MaaWpfGui/Configuration/ConfigFactory.cs

@@ -131,7 +131,7 @@ namespace MaaWpfGui.Configuration
             };
         }
 
-        private static Root Root => _rootConfig.Value;
+        public static Root Root => _rootConfig.Value;
 
         public static readonly SpecificConfig CurrentConfig = Root.CurrentConfig;
 

src/MaaWpfGui/Configuration/GUI.cs

@@ -47,7 +47,7 @@ namespace MaaWpfGui.Configuration
             /// <summary>
             /// 暗黑的主题。
             /// </summary>
-            Dark
+            Dark,
         }
     }
 }

src/MaaWpfGui/Configuration/SpecificConfig.cs

@@ -15,6 +15,7 @@ namespace MaaWpfGui.Configuration
 {
     public class SpecificConfig
     {
-        public GUI GUI { get; } = new GUI();
+        // ReSharper disable once UnusedAutoPropertyAccessor.Global
+        public GUI GUI { get; set; } = new GUI();
     }
 }