Pull request #4105: CHART-19018 插入悬浮图表后，再插入单元格图表，无法点出图表属性面板

Merge in DESIGN/design from ~HENRY.WANG/design:feature/10.0 to feature/10.0

* commit '394b4702629b28fd4ec76f217b9ebcdc638b2945':
  CHART-19018 插入悬浮图表后，再插入单元格图表，无法点出图表属性面板

designer-base/src/main/java/com/fr/design/mainframe/EastRegionContainerPane.java

@@ -843,10 +843,8 @@ public class EastRegionContainerPane extends UIEastResizableContainer {
         }
 
         public void replaceContentPane(JComponent pane) {
-            if (pane != this.contentPane) {
             contentArea.remove(this.contentPane);
             contentArea.add(this.contentPane = pane);
-            }
             if (popupDialog != null && isPoppedOut) {
                 popupDialog.replaceContentPane(this);
             }