Fix label overlapping button

By drawing the label first we avoid the overlap. By drawing just the label without the foldout we need to work around a unity problem with indentation and apply that ourselves. The foldout property will then be rendered without gui content

Author: JohannesDeml

Assets/MackySoft/MackySoft.SerializeReferenceExtensions/Editor/SubclassSelectorDrawer.cs

@@ -35,6 +35,17 @@ public override void OnGUI (Rect position,SerializedProperty property,GUIContent
 			EditorGUI.BeginProperty(position,label,property);
 
 			if (property.propertyType == SerializedPropertyType.ManagedReference) {
+				// Check if a custom property drawer exists for this type.
+				PropertyDrawer customDrawer = GetCustomPropertyDrawer(property);
+				if (customDrawer != null)
+				{
+					// render label first to avoid label overlap for lists
+					Rect foldoutLabelRect = new Rect(position);
+					foldoutLabelRect.height = EditorGUIUtility.singleLineHeight;
+					foldoutLabelRect.x += EditorGUI.indentLevel * 12;
+					EditorGUI.PrefixLabel(foldoutLabelRect, label);
+				}
+				
 				// Draw the subclass selector popup.
 				Rect popupPosition = new Rect(position);
 				popupPosition.width -= EditorGUIUtility.labelWidth;
@@ -46,15 +57,13 @@ public override void OnGUI (Rect position,SerializedProperty property,GUIContent
 					m_TargetProperty = property;
 					popup.TypePopup.Show(popupPosition);
 				}
-
-				// Check if a custom property drawer exists for this type.
-				PropertyDrawer customDrawer = GetCustomPropertyDrawer(property);
+				
 				if (customDrawer != null)
 				{
 					// Draw the property with custom property drawer.
 					Rect foldoutRect = new Rect(position);
 					foldoutRect.height = EditorGUIUtility.singleLineHeight;
-					property.isExpanded = EditorGUI.Foldout(foldoutRect, property.isExpanded, label, true);
+					property.isExpanded = EditorGUI.Foldout(foldoutRect, property.isExpanded, GUIContent.none, true);
 
 					if (property.isExpanded)
 					{