Bug 122045 Template should show blank preview when there is no image
Create a template but do not associate an image with it. Place the template in the templates directory. Now, create a new report design. On the second page of the New Report dialog, select the template that has no image. Actual result: The preview appears as a white rectangle with a small red square in the top left. Expected result: The preview appears as a gray background in the preview image area.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/ui/ReportPlatformUIImages.java
declareImage( IReportGraphicConstants.ICON_NODE_BODY, ICONS_PATH
				+ OBJ16_PATH + "body_icon.gif" ); 
		declareImage( IReportGraphicConstants.ICON_NODE_MASTERPAGES, ICONS_PATH
				+ OBJ16_PATH + "master_pages.gif" ); 
		declareImage( IReportGraphicConstants.ICON_NODE_STYLES, ICONS_PATH
				+ OBJ16_PATH + "styles.gif" ); 
		declareImage( IReportGraphicConstants.ICON_NODE_HEADER, ICONS_PATH
				+ OBJ16_PATH + "header.gif" ); 
		declareImage( IReportGraphicConstants.ICON_NODE_DETAILS, ICONS_PATH
				+ OBJ16_PATH + "details.gif" ); 
		declareImage( IReportGraphicConstants.ICON_NODE_FOOTER, ICONS_PATH
				+ OBJ16_PATH + "footer.gif" ); 
		declareImage( IReportGraphicConstants.ICON_NODE_GROUPS, ICONS_PATH
				+ OBJ16_PATH + "group.gif" ); 
		declareImage( IReportGraphicConstants.ICON_NODE_GROUP_HEADER,
				ICONS_PATH + OBJ16_PATH + "group_header.gif" ); 
		declareImage( IReportGraphicConstants.ICON_NODE_GROUP_FOOTER,
				ICONS_PATH + OBJ16_PATH + "group_footer.gif" ); 
		declareImage( IReportGraphicConstants.ICON_NODE_LIBRARIES, ICONS_PATH
				+ OBJ16_PATH + "library_folder.gif" ); 
		declareImage( IReportGraphicConstants.ICON_NODE_THEMES, ICONS_PATH
				+ OBJ16_PATH + "theme.gif" ); 
		
		declareImage( IReportGraphicConstants.ICON_LAYOUT_NORMAL, ICONS_PATH
				+ EVIEW16_PATH + "normal_page.gif" ); 
		declareImage( IReportGraphicConstants.ICON_LAYOUT_MASTERPAGE,
				ICONS_PATH + EVIEW16_PATH + "master_page.gif" ); 
		declareImage( IReportGraphicConstants.ICON_LAYOUT_RULER, ICONS_PATH
				+ EVIEW16_PATH + "show_rulers.gif" );