REPORT-61413 【主题切换】cpt预览图里的左上角斜线单元格应该和小标题格式一致

【问题原因】
表头单元格适用于小标题样式

【改动思路】
同上

designer-base/src/main/java/com/fr/design/mainframe/theme/preview/ecpreview/ECReportPreviewPane.java

@@ -68,7 +68,7 @@ public class ECReportPreviewPane extends UINoOpaquePanel implements ThemePreview
                     Toolkit.i18nText("Fine-Design_Basic_Template_Theme_Profile_Pane_EC_Data"), Toolkit.i18nText("Fine-Design_Basic_Template_Theme_Profile_Pane_Row_Name")},
                     new Point2D[]{new Point(159, 71), new Point(225, 49)});
             cornerCell.setPreferredSize(new Dimension(225, 71));
-            headerCellList.add(cornerCell);
+            titleCellList.add(cornerCell);
             northPane.add(cornerCell, BorderLayout.WEST);
             JPanel centerPane = FRGUIPaneFactory.createBorderLayout_NO_Opaque_Pane();
             northPane.add(centerPane, BorderLayout.CENTER);