Bug 136256 Enhance the message builder
Please see the spec attached in 133995 for detail.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/ui/dialogs/ImageBuilder.java
public void widgetSelected( SelectionEvent e )
			{
				switchTo( EMBEDDED_TYPE );
			}
		} );
		dynamic = new Button( selectionArea, SWT.RADIO );
		dynamic.setText( Messages.getString( "ImageBuilder.Button.Dynamic" ) ); 
		dynamic.addSelectionListener( new SelectionAdapter( ) {
			public void widgetSelected( SelectionEvent e )
			{
				switchTo( BLOB_TYPE );
			}
		} );
	}
	private void createInputArea( Composite parent )
	{
		inputArea = new Composite( parent, SWT.NONE );
		GridData gd = new GridData( GridData.FILL_BOTH
				| GridData.HORIZONTAL_ALIGN_BEGINNING );
		gd.widthHint = 300;
		gd.heightHint = 300;
		inputArea.setLayoutData( gd );
		inputArea.setLayout( new GridLayout( ) );
	}
	private void createPreviewArea( Composite composite )
	{
		Composite previewArea = new Composite( composite, SWT.BORDER );
		GridData gd = new GridData( GridData.FILL_BOTH );
		gd.widthHint = 250;
		gd.heightHint = 300;