view.items_Shortcuts: apply; Viewport: border layout

* items_Shortcuts: app modules privide their launch buttons
  they are used as in desktop as in bar menu
* view.Desktop: add `id` 'cos it is the one and thus can be easily
  accessable via `Ext.getCmp('desk')`
* border layout in Viewport has changable docking (manually for know)
  of view.Bar