Fix label overlapping button

By drawing the button later, the label won't overlap the button. This seems to be a bug with list renderings. The width is correctly calculated for the button, but somehow not applied in the list rendering (there seems to be a minsize for the button, but I didn't find the code that would enforce that)

Author: JohannesDeml

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

@@ -41,12 +41,6 @@ public override void OnGUI (Rect position,SerializedProperty property,GUIContent
 				popupPosition.x += EditorGUIUtility.labelWidth;
 				popupPosition.height = EditorGUIUtility.singleLineHeight;
 
-				if (EditorGUI.DropdownButton(popupPosition,GetTypeName(property),FocusType.Keyboard)) {
-					TypePopupCache popup = GetTypePopup(property);
-					m_TargetProperty = property;
-					popup.TypePopup.Show(popupPosition);
-				}
-
 				// Check if a custom property drawer exists for this type.
 				PropertyDrawer customDrawer = GetCustomPropertyDrawer(property);
 				if (customDrawer != null)
@@ -72,6 +66,13 @@ public override void OnGUI (Rect position,SerializedProperty property,GUIContent
 				{
 					EditorGUI.PropertyField(position, property, label, true);
 				}
+				
+				// Draw button after label to avoid label overlap in list rendering
+				if (EditorGUI.DropdownButton(popupPosition,GetTypeName(property),FocusType.Keyboard)) {
+					TypePopupCache popup = GetTypePopup(property);
+					m_TargetProperty = property;
+					popup.TypePopup.Show(popupPosition);
+				}
 			} else {
 				EditorGUI.LabelField(position,label,k_IsNotManagedReferenceLabel);
 			}