Change FlowchartWindow Style caching

Now forces expended values into the cached style repeatedly. In newer Unity UI we were seeing missing alignment and colour during caching

Assets/Fungus/Scripts/Editor/FlowchartWindow.cs

@@ -286,39 +286,40 @@ namespace Fungus.EditorUtils
             if (nodeStyle == null)
             {
                 nodeStyle = new GUIStyle();
+            }
+
             // All block nodes use the same GUIStyle, but with a different background
             nodeStyle.border = new RectOffset(HorizontalPad, HorizontalPad, VerticalPad, VerticalPad);
             nodeStyle.padding = nodeStyle.border;
             nodeStyle.contentOffset = Vector2.zero;
             nodeStyle.alignment = TextAnchor.MiddleCenter;
             nodeStyle.wordWrap = true;
-            }
 
             if (EditorStyles.helpBox != null && descriptionStyle == null)
             {
                 descriptionStyle = new GUIStyle(EditorStyles.helpBox);
-                descriptionStyle.wordWrap = true;
             }
+            descriptionStyle.wordWrap = true;
 
             if (EditorStyles.whiteLabel != null && handlerStyle == null)
             {
                 handlerStyle = new GUIStyle(EditorStyles.label);
+            }
             handlerStyle.wordWrap = true;
             handlerStyle.margin.top = 0;
             handlerStyle.margin.bottom = 0;
             handlerStyle.alignment = TextAnchor.MiddleCenter;
-            }
 
             if (blockSearchPopupNormalStyle == null || blockSearchPopupSelectedStyle == null)
             {
                 blockSearchPopupNormalStyle = new GUIStyle(GUI.skin.FindStyle("MenuItem"));
+            }
             blockSearchPopupNormalStyle.padding = new RectOffset(8, 0, 0, 0);
             blockSearchPopupNormalStyle.imagePosition = ImagePosition.ImageLeft;
             blockSearchPopupSelectedStyle = new GUIStyle(blockSearchPopupNormalStyle);
             blockSearchPopupSelectedStyle.normal = blockSearchPopupSelectedStyle.hover;
             blockSearchPopupNormalStyle.hover = blockSearchPopupNormalStyle.normal;
         }
-        }
 
         protected virtual void OnDisable()
         {