Bug 127354 For template, relative path to template image does not work
Steps to reproduce: 1. Create a new template. 2. In the wizard, in Template Image, type a relative path to an image. For example, use an image in the project directory in which you are creating the template. Expected: It works. Actual: Error "Image file '<file name>' does not exist" shows in the UI. If you go ahead and create the template anyway, you cannot publish to the template folder, because Finish is not enabled.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/ui/dialogs/ImageBuilder.java
{
			embeddedImageList.select( index );
			preview( );
		}
		else
		{
			clearPreview( );
		}
		updateButtons( );
	}
	private void updateButtons( )
	{
		boolean complete = false;
		switch ( selectedType )
		{
			case BLOB_TYPE :
				complete = !StringUtil.isBlank( uriEditor.getText( ) );
				previewButton.setEnabled( false );
				if ( SessionHandleAdapter.getInstance( )
						.getReportDesignHandle( )
						.getVisibleDataSets( )
						.isEmpty( ) )
				{
					bindingButton.setEnabled( false );
				}
				else
				{
					bindingButton.setEnabled( true );
				}
				break;