    layout:{
        ntype: 'vbox',
        pack: 'start', // 'start', 'center', 'end', null
        align: 'start', // 'start', 'center', 'end', 'stretch', null
    }

The _pack_ config species how items are packed on the major
axis. 
- _start_ &mdash; items at the top
- _center_ &mdash; items at the top-to-bottom middle 
- _end_ &mdash; items at the end

The _align_ config specifies how items are justified on the minor
axis. 
- _start_ &mdash; items are left justified
- _center_ &mdash; items ae center justified 
- _end_ &mdash; items are right justified
- _stretch_ &mdash; items take up the full width
