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_BORDER_ALL, ICONS_PATH
				+ OBJ16_PATH + "borders_frame.gif" ); 
		declareImage( IReportGraphicConstants.ICON_BORDER_BOTTOM, ICONS_PATH
				+ OBJ16_PATH + "border_bottom.gif" ); 
		declareImage( IReportGraphicConstants.ICON_BORDER_TOP, ICONS_PATH
				+ OBJ16_PATH + "border_top.gif" ); 
		declareImage( IReportGraphicConstants.ICON_BORDER_LEFT, ICONS_PATH
				+ OBJ16_PATH + "border_left.gif" ); 
		declareImage( IReportGraphicConstants.ICON_BORDER_RIGHT, ICONS_PATH
				+ OBJ16_PATH + "border_right.gif" ); 
		declareImage( IReportGraphicConstants.ICON_BORDER_NOBORDER, ICONS_PATH
				+ OBJ16_PATH + "border_none.gif" ); 
		
		declareImage( IReportGraphicConstants.ICON_MISSING_IMG, ICONS_PATH
				+ PROGRESS_PATH + "missing_image.gif" ); 
		
		declareImage( IReportGraphicConstants.ICON_DATA_EXPLORER_VIEW,
				ICONS_PATH + EVIEW16_PATH + "data_explorer_view.gif" ); 
		declareImage( IReportGraphicConstants.ICON_NODE_DATA_SETS, ICONS_PATH
				+ OBJ16_PATH + "data_set_folder.gif" ); 
		declareImage( IReportGraphicConstants.ICON_NODE_DATA_SOURCES,
				ICONS_PATH + OBJ16_PATH + "data_source_folder.gif" ); 
		declareImage( IReportGraphicConstants.ICON_NODE_PARAMETERS, ICONS_PATH
				+ OBJ16_PATH + "parameter_folder.gif" ); 
		
		
		declareImage( IReportGraphicConstants.ICON_EXPRESSION_DATA_TABLE,
				ICONS_PATH + OBJ16_PATH + "data_table.gif" ); 
		declareImage( IReportGraphicConstants.ICON_DATA_COLUMN, ICONS_PATH