move `userstatus` menu in `appbar` to 'userman' module

static prototype was converted to functional item in app module
`items_Bar` is glue f module bar needs and Bar itself

* change 'userman.model.User' item to simple 'name'
* fix `desktop.Shortcuts` to work without 'userman' in config
view.Desktop noop: refactor 'desktop.Status' setup
App.view.items_Bar: GC

fix 2444e61c349eff2735666267a98668e1c24b6809
items_Shortcuts: move 'userman' shortcut in module

static prototype was converted to functional item in app module
`items_Shortcuts` is glue of module shortcuts needs and UI itself