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
.getStringProperty( ModuleHandle.DESCRIPTION_PROP );
				if ( templateDescription == null )
				{
					templateDescription = "";
				}
				picturePath = reportDesign.getIconFile( ) == null
						? "" : reportDesign.getIconFile( );
				cheatSheetId = reportDesign.getCheetSheet( ) == null
						? "" : reportDesign.getCheetSheet( );
				this.reportPath = reportPath;
			}
			catch ( DesignFileException e )
			{
			}
		}
		private String name;
		private String templateDescription;
		private String reportPath;
		private String picturePath;
		private String cheatSheetId;
		public String getCheatSheetId( )
		{
			return cheatSheetId;
		}
		public void setCheatSheetId( String cheatSheetId )
		{
			this.cheatSheetId = cheatSheetId;
		}
		public String getName( )
		{