Merge pull request #18 from SolidAlloy/guid-duplication-fix

Fix GUID duplication errors when the package is installed via Git or OpenUPM

Author: xsduan

Editor/FolderEditor.cs

@@ -13,7 +13,7 @@ public class FolderEditor : UnityEditor.Editor
         public override bool RequiresConstantRepaint() => true;
         public override void OnInspectorGUI()
         {
-            this._expanded = EditorGUILayout.Foldout(this._expanded, "Icon Color");
+            this._expanded = EditorGUILayout.Foldout(this._expanded, "Icon Color", true);
             if (this._expanded) { this.RenderColorPicker(); }
         }