Add selectable color schemes

Services/ConfigService.cs

@@ -36,7 +36,7 @@ public static class ConfigService
 
         string json = File.ReadAllText(ConfigPath);
         LauncherConfig config = JsonSerializer.Deserialize<LauncherConfig>(json, JsonOptions) ?? CreateDefaultConfig();
-        NormalizeDisplayModes(config);
+        NormalizeConfig(config);
         Save(config);
         return config;
     }
@@ -74,7 +74,7 @@ public static class ConfigService
             Directory.CreateDirectory(destinationFolder);
         }
 
-        NormalizeDisplayModes(config);
+        NormalizeConfig(config);
         string json = JsonSerializer.Serialize(config, JsonOptions);
         File.WriteAllText(destinationPath, json);
         return destinationPath;
@@ -155,7 +155,7 @@ public static class ConfigService
             ]
         };
 
-        NormalizeDisplayModes(config);
+        NormalizeConfig(config);
         return config;
     }
 
@@ -179,7 +179,7 @@ public static class ConfigService
         }
 
         ValidateConfig(config);
-        NormalizeDisplayModes(config);
+        NormalizeConfig(config);
         return config;
     }
 
@@ -214,8 +214,18 @@ public static class ConfigService
         }
     }
 
-    private static void NormalizeDisplayModes(LauncherConfig config)
+    private static void NormalizeConfig(LauncherConfig config)
     {
+        if (!Enum.IsDefined(config.DisplayMode))
+        {
+            config.DisplayMode = LauncherDisplayMode.CompactList;
+        }
+
+        if (!Enum.IsDefined(config.ThemeScheme))
+        {
+            config.ThemeScheme = LauncherThemeScheme.MarkHaven;
+        }
+
         foreach (LauncherItem item in config.Items)
         {
             NormalizeDisplayModes(item);