Bug 167545 Copy a cascading parameter group and paste it to another parameter group causes an exception thrown
Steps to reproduce: 1.Copy a cascading parameter group using short cut key "Ctrl+x"/"Ctrl+c", or choosing context menu "Cut"/"Copy"; 2.Paste it to another parameter group using short cut key "Ctrl+v", or choosing context menu "Paste"; Expected result: The source one is pasted in the destination. Actual result: An exception thrown org.eclipse.birt.report.model.api.command.ContentException: The Cascading Parameter Group("Source") is not allowed in the slot (parameters) of Parameter Group("Destination").
UI/org.eclipse.birt.report.designer.core/src/org/eclipse/birt/report/designer/util/DEUtil.java
return getLargerFontSizeIntValue( handle.getContainer( ) );
			}
			else if ( fontSize.equals( DesignChoiceConstants.FONT_SIZE_SMALLER ) )
			{
				return getSmallerFontSizeIntValue( handle.getContainer( ) );
			}
			else
			{
				for ( int i = DesignerConstants.fontSizes.length - 1; i > 0; i-- )
				{
					if ( fontSize.equals( DesignerConstants.fontSizes[i][0] ) )
					{
						return Integer.parseInt( DesignerConstants.fontSizes[i - 1][1] );
					}
				}
				return Integer.parseInt( DesignerConstants.fontSizes[0][1] );
			}
		}
		else
		{
			
			String size = (String) DesignerConstants.fontMap.get( DesignChoiceConstants.FONT_SIZE_MEDIUM );
			return Integer.parseInt( size ) - 1;
		}
	}
	/**
	 * Since "&" in menu text has special meaning, we must escape it before
	 * displaying.
	 * 
	 * @param src