refactor: users should change the SystemAccentColor from system-wide settings

Author: love-linger

src/App.axaml.cs

@@ -164,12 +164,7 @@ public static void SetTheme(string theme, string themeOverridesFile)
                     var resDic = new ResourceDictionary();
                     var overrides = JsonSerializer.Deserialize(File.ReadAllText(themeOverridesFile), JsonCodeGen.Default.ThemeOverrides);
                     foreach (var kv in overrides.BasicColors)
-                    {
-                        if (kv.Key.Equals("SystemAccentColor", StringComparison.Ordinal))
-                            resDic["SystemAccentColor"] = kv.Value;
-                        else
-                            resDic[$"Color.{kv.Key}"] = kv.Value;
-                    }
+                        resDic[$"Color.{kv.Key}"] = kv.Value;
 
                     if (overrides.GraphColors.Count > 0)
                         Models.CommitGraph.SetPens(overrides.GraphColors, overrides.GraphPenThickness);