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/internal/ui/wizards/WizardTemplateChoicePage.java
{
	private static final String MESSAGE_DESCRIPTION = Messages
			.getString( "WizardTemplateChoicePage.label.Description" ); 
	private static final String MESSAGE_PREVIEW = Messages
			.getString( "WizardTemplateChoicePage.label.Preview" ); 
	private static final String MESSAGE_REPORT_TEMPLATES = Messages
			.getString( "WizardTemplateChoicePage.label.ReportTemplates" ); 
	private static final String MESSAGE_SHOW_CHEATSHEET = Messages
			.getString( "WizardTemplateChoicePage.label.ShowCheatSheets" ); 
	
	
	private static final String TITLE_SIDE_BY_SIDE_CHART_LISTING = Messages
			.getString( "WizardTemplateChoicePage.title.SideBySideChartListing" ); 
	private static final String TITLE_CHART_LISTING = Messages
			.getString( "WizardTemplateChoicePage.title.ChartListing" ); 
	private static final String TITLE_GROUPED_LISTING = Messages
			.getString( "WizardTemplateChoicePage.title.GroupedListing" ); 
	private static final String TITLE_SIMPLE_LISTING = Messages
			.getString( "WizardTemplateChoicePage.title.SimpleListing" ); 
	private static final String TITLE_BLANK_REPORT = Messages